a person has a mass of 45kg. how much does she weigh on the moon, where g=3m/s^2

The distance 'd' from the top to the bottom of the mirror should be greater than or equal to the man's height 'h'. This ensures that the mirror captures the full height of the man from his feet to the top of his head.

Distance is a measurement οf hοw far apart twο things οr lοcatiοns are, either quantitatively οr οccasiοnally qualitatively. Distance in physics οr cοmmοn language can refer tο a physical distance οr an estimate based οn οther factοrs (such as "twο cοunties οver").

Let's assume the height of the man is represented by 'h' . The distance from the top to the bottom of the mirror is represented by 'd'.

When the man looks into the mirror, the angle of incidence (the angle between the incident light ray and the mirror) is equal to the angle of reflection (the angle between the reflected light ray and the mirror). To see both the top of his head and his feet, the man needs to ensure that the reflected rays from the top of his head and his feet reach his eyes.

Considering the geometry of the situation, the angle of incidence for the top of the head is larger than the angle of incidence for the feet. This is because the top of the head is higher, and the light ray from the top of the head has to be reflected downward to reach the man's eyes.

To see both the top of his head and his feet, the man needs to position the mirror in such a way that the reflected rays from both the top of his head and his feet enter his field of vision.

Therefore, the distance 'd' from the top to the bottom of the mirror should be greater than or equal to the man's height 'h'. This ensures that the mirror captures the full height of the man from his feet to the top of his head.

In summary, the distance 'd' from the top to the bottom of the mirror should be equal to or greater than the man's height 'h' in order for him to see both the top of his head and his feet in the mirror.

To learn more about distance, visit.

https://brainly.com/question/13034462

#SPJ4

To determine the value of k in the given wave function, we need to relate the kinetic energy of the electron to the value of k.

The kinetic energy (KE) of a particle with mass m can be related to its momentum (p) by the equation:

KE = p^2 / (2m)

For a free particle, the momentum (p) can be related to the wave vector (k) as:

p = ℏk

where ℏ is the reduced Planck's constant.

Substituting the expression for momentum into the equation for kinetic energy, we have:

KE = (ℏ^2 k^2) / (2m)

Given that the kinetic energy of the electron is 9.0 eV, we can express it in joules by converting the electronvolt (eV) to joules:

1 eV = 1.602 x 10^-19 J

So, 9.0 eV = 9.0 x 1.602 x 10^-19 J

Now we can equate the expression for kinetic energy to the given value and solve for k:

(ℏ^2 k^2) / (2m) = 9.0 x 1.602 x 10^-19 J

To solve for k, we need to know the mass of the electron (m) and the value of ℏ (reduced Planck's constant).

learn more about kinetic energy here

https://brainly.com/question/22174271

#SPJ11

If your car gets 37.4 miles per gallon, it is approximately equivalent to 15.89 kilometers per liter.

To convert miles per gallon (mpg) to kilometers per liter (km/L), we can use the conversion factors of 1 mile ≈ 1.60934 kilometers and 1 gallon ≈ 3.78541 liters.

Given that the car gets 37.4 miles per gallon, we can calculate the equivalent in kilometers per liter.

First, we convert miles to kilometers by multiplying 37.4 mpg by 1.60934 km/mile, which gives us approximately 60.07 km/gallon.

Next, we convert gallons to liters by dividing 60.07 km/gallon by 3.78541 L/gallon, resulting in approximately 15.89 km/L.

Learn more about miles per gallon here:

https://brainly.com/question/30525562

#SPJ11

If the magnetic field were to be flipped so that it points in the opposite direction, the stream of negatively-charged particles would experience an upward force.

In order to make the stream of negatively-charged particles experience an upward force, we need to change the direction of either the particle stream or the magnetic field. Here's a step-by-step explanation:

1. The original situation: The negatively-charged particles are moving to the right and experience a downward force due to the magnetic field.
2. Change the direction of the particle stream: If you reverse the direction of the particle stream (i.e., make the particles move to the left instead of right), the force they experience will also reverse and become upward.
3. Change the direction of the magnetic field: If you reverse the direction of the magnetic field, the force on the negatively-charged particles will change direction and become upward, while they continue to move to the right.

So, to achieve an upward force on the particle stream, you can either reverse the direction of the particle stream or reverse the direction of the magnetic field.

To know more about Magnetic Field, visit:

https://brainly.in/question/38256991

#SPJ11

The correct prediction regarding the energy of the system is option (a): If the mass of the block is changed to 0.5 kg and all other quantities are held constant, the maximum kinetic energy of the system will be half of the value from the original situation.

The maximum potential energy stored in the spring is given by the equation: PE = (1/2)kx², where k is the spring constant and x is the displacement from the equilibrium position. Since the spring constant and displacement remain constant in this scenario, the potential energy will also remain constant.

According to the law of conservation of energy, the maximum kinetic energy of the system is equal to the maximum potential energy stored in the spring. Therefore, if the mass of the block is halved while keeping other quantities constant, the maximum potential energy will be halved as well, leading to a decrease in the maximum kinetic energy of the system.

It's important to note that options (b), (c), and (d) are not correct predictions as they do not align with the principles of conservation of energy and the relationships between mass, spring constant, displacement, and energy in the given scenario.

know more about potential energy click here:

https://brainly.com/question/24284560

#SPJ11

At a jet airliner altitude of 38,000 feet, the diameter of the laser beam would be approximately 37.34 meters.

Beam divergence refers to the spreading out of a laser beam as it travels away from its source. The angle of divergence (θ) can be approximated using the formula:

θ = λ / (π * D)

Where:

θ is the angle of divergence,

λ is the wavelength of the laser light,

D is the diameter of the circular aperture.

First, let's calculate the angle of divergence using the given values:

θ = 5.32 × 10⁻⁷ m / (π * 1.25 × 10⁻³ m)

θ ≈ 0.135 radians

Now, we can calculate the diameter of the laser beam at the jet airliner altitude by using the tangent of the angle of divergence and the altitude:

Beam diameter = 2 * altitude * tan(θ)

Beam diameter = 2 * (38,000 × 0.3048 m) * tan(0.135 radians)

Beam diameter ≈ 37.34 meters

Learn more about laser beam here:

https://brainly.com/question/31200718

#SPJ11

The driver of the fire truck hears a frequency of approximately 475.8 Hz. The frequency that the driver of the fire truck hears can be found using the formula:
f' = (v + vd) / (v + vs) * f

where f is the frequency of the siren, v is the speed of sound in air, vs is the speed of the fire truck, and vd is the speed of the observer (in this case, the driver) relative to the air.
Plugging in the given values, we get:
f' = (343 + 31) / (343 + 0) * 439
f' = 475.8 Hz

To know more about frequency visit :-

https://brainly.com/question/29739263

#SPJ11

This means that the can can hold up to 785.4 cubic centimeters of liquid when filled to the brim.

Based on the information provided, it sounds like we're dealing with a cylinder-shaped container (the can) that has a heavy spherical ball dropped into it. Then, liquid is poured into the can until the ball is just covered.
To calculate the volume of the cylinder (which we'll need to know in order to figure out how much liquid was poured in), we'll need to know the height and radius of the cylinder. Once we have those values, we can use the formula for the volume of a cylinder, which is:
V = πr^2h
where V is the volume, π (pi) is a constant equal to approximately 3.14, r is the radius, and h is the height.
So, if we know that the cylinder is, say, 10 cm tall and has a radius of 5 cm, we can plug those values into the formula to get:
V = π(5^2)(10)
V = 785.4 cubic centimeters (rounded to one decimal place)
To know more about volume, visit:

https://brainly.com/question/28058531

#SPJ11

The same distance could have been traveled over the given time period at a constant velocity of 8 units per second.

To find the constant velocity, we need to calculate the average velocity over the given time period. The average velocity is equal to the total distance traveled divided by the total time taken. In this case, the total time period is from t = 0 to t = 4.

To find the total distance, we integrate the velocity function over the time period:

Distance = ∫[0 to 4] v(t) dt

After performing the integration, we find the total distance traveled over the time period.

Next, we divide the total distance by the total time (4 seconds) to find the average velocity. In this case, the constant velocity that would cover the same distance over the given time period is 8 units per second.

learn more about " velocity ":- https://brainly.com/question/80295

#SPJ11

The magnitude of the impulse imparted to the golf ball can be determined using the impulse-momentum principle, which states that the impulse experienced by an object is equal to the change in momentum it undergoes.

The momentum of an object can be calculated by multiplying its mass by its velocity.

Given:

Mass of the golf ball (m) = 0.050 kg

Initial velocity of the golf ball (u) = 0 m/s (since it starts from rest)

Final velocity of the golf ball (v) = 70.0 m/s

The change in momentum (Δp) can be calculated as:

Δp = m * (v - u)

Substituting the given values:

Δp = 0.050 kg * (70.0 m/s - 0 m/s)

Δp = 0.050 kg * 70.0 m/s

Δp = 3.50 kg·m/s

Therefore, the magnitude of the impulse imparted to the golf ball is 3.50 kg·m/s.

Learn more about momentum principle here:

https://brainly.com/question/30275950

#SPJ11

The magnitude of the impulse imparted to the golf ball is 3.5 N·s.

Impulse is defined as the change in momentum of an object. The magnitude of impulse can be calculated using the formula:

Impulse = Δp = m * Δv

Where:

Δp is the change in momentum,

m is the mass of the golf ball, and

Δv is the change in velocity.

Given:

Mass of the golf ball, m = 0.050 kg

Initial velocity, v₁ = 0 m/s (assuming the ball was at rest initially)

Final velocity, v₂ = 70.0 m/s

The change in velocity is Δv = v₂ - v₁ = 70.0 m/s - 0 m/s = 70.0 m/s.

Substituting the values into the formula, we get:

Impulse = m * Δv = 0.050 kg * 70.0 m/s = 3.5 N·s.

Therefore, the magnitude of the impulse imparted to the golf ball is 3.5 N·s.

To know more about momentum, refer here:

https://brainly.com/question/30677308#

#SPJ4

The ratio of the canister's velocity, as measured on Earth, to the speed of light is approximately 0.99.

To determine the ratio of the canister's velocity, as measured on Earth, to the speed of light (c), we need to apply the relativistic velocity addition formula. Let's denote the velocity of the canister as observed from Earth as v. According to the given information, the velocity of the spaceship relative to Earth is 0.95c, and the velocity of the canister relative to the spaceship is 0.65c.

Using the relativistic velocity addition formula, we have:

[tex]v = (v1 + v2) / (1 + (v1 * v2) / c^2)[/tex]

Substituting the given values, we get:

[tex]v = (0.95c + 0.65c) / (1 + (0.95c * 0.65c) / c^2)[/tex]

Simplifying further, we have:

v = 1.6c / (1 + 0.6175)

v = 1.6c / 1.6175

v ≈ 0.99c

Therefore, the ratio of the canister's velocity, as measured on Earth, to the speed of light is approximately 0.99.

To learn more about canister's velocity from the given link

https://brainly.com/question/29692422

#SPJ4

If a double eclipse were to occur with a lunar eclipse and a solar eclipse happening simultaneously, it would be possible to observe a double eclipse from a specific town on Earth. This would be an extraordinary and rare event, as it would require precise alignment and timing of both the Earth, Moon, and Sun. However, it is important to note that such a simultaneous occurrence of a lunar and solar eclipse is highly improbable in reality.

Expressed using two significant figures, the electric field strength is approximately 0.93 kV/m.To find the electric field strength, we'll use the formula for energy stored in a capacitor:  Energy (U) = (1/2) * ε₀ * E^2 * V

where ε₀ is the vacuum permittivity (8.854 x 10^-12 F/m), E is the electric field strength, and V is the volume of the region.
Given:
Energy (U) = 100 pJ = 100 x 10^-12 J
Volume (V) = 3.0 cm × 3.0 cm × 3.0 cm = (3 x 10^-2 m)^3 = 27 x 10^-6 m^3
Rearrange the formula for E:
E^2 = (2 * U) / (ε₀ * V)-
Now, plug in the values:
E^2 = (2 * 100 x 10^-12) / (8.854 x 10^-12 * 27 x 10^-6)
E^2 ≈ 0.857
Take the square root to find E:
E ≈ 0.926 kV/m

To know more about electric field visit :-

https://brainly.com/question/11482745

#SPJ11

Yes, we can use proportionality to solve this problem. The second child is located 1.30 m from the pivot.

According to the law of balance, the product of the mass and the distance from the pivot on either side of the seesaw should be equal. In other words, if we multiply the mass of the first child by their distance from the pivot, it should be equal to the product of the mass of the second child and their distance from the pivot.
Therefore;
mass1 * distance1 = mass2 * distance2
Given,

mass1 = 26.0 kg and distance1 = 1.60 m for the first child,

mass2 = 32.0 kg for the second child,

we can solve for distance2;
26.0 kg * 1.60 m = 32.0 kg * distance2
Now, we can find the distance2;
41.6 = 32.0 * distance2
distance2 = 41.6 / 32.0
distance2 ≈ 1.30 m
To know more about law of balance, visti:

https://brainly.com/question/10495378

#SPJ11

a) When the two waves interfere constructively, their amplitudes add up and result in a larger amplitude.

This happens when the peaks and troughs of the two waves line up perfectly. Mathematically, this occurs when the path difference between the two waves is an integer multiple of the wavelength. So, for constructive interference: delta x = n * lambda (where n is any integer)Two values of delta x that satisfy this condition are delta x = lambda and delta x = 2 * lambda.

b) On the other hand, when the two waves interfere destructively, their amplitudes cancel out and result in a smaller or zero amplitude. This happens when the peaks of one wave line up with the troughs of the other wave.

Mathematically, this occurs when the path difference between the two waves is a half-integer multiple of the wavelength. So, for destructive interference: delta x = (n + 0.5) * lambda (where n is any integer)Two values of delta x that satisfy this condition are delta x = 0.5 * lambda and delta x = 1.5 * lambda.

To know more about wave visit -

brainly.com/question/3639648

#SPJ11

The magnitude of the magnetic field, b, inside the solenoid is 0.107 T (tesla). The permeability of free space (4π × 10⁻⁷ T·m/A),

To calculate the magnetic field inside the solenoid, we can use the formula: B = μ₀nI, where B is the magnetic field, μ₀ is the permeability of free space (4π × 10⁻⁷ T·m/A), n is the number of turns per unit length (in this case, 5000 turns divided by the length of the solenoid, which is 1.3 m), and I is the current.

In this formula, μ₀ is the permeability of free space (4π × 10⁻⁷ Tm/A), n is the number of turns per unit length (turns/meter), and I is the current (A).
Step 1: Calculate the number of turns per unit length (n)
n = total turns / length = 5000 turns / 1.3 m = 3846.15 turns/m
Step 2: Use the formula to calculate the magnetic field (B)
B = (4π × 10⁻⁷ Tm/A) * (3846.15 turns/m) * (0.8 A)
B ≈ 0.065 T .
To know more about magnetic field visit:

https://brainly.com/question/19542022

#SPJ11

The magnitude of the magnetic field inside the solenoid is approximately 2.4 x 10⁻² tesla.

What is solenoid?

A solenoid is a coil of wire that is typically wound in a helical shape. It is an electromechanical device that converts electrical energy into linear motion or magnetic force.

The construction of a solenoid typically involves a cylindrical or elongated form around which the wire is wound. The wire is usually made of a conducting material, such as copper or aluminum, and is insulated to prevent short circuits.

When an electric current flows through the wire coil, a magnetic field is generated along the axis of the solenoid. The strength of the magnetic field depends on the number of turns in the coil, the magnitude of the current, and the properties of the core material (if present).

To calculate the magnetic field inside the solenoid, we can use the formula for the magnetic field inside an ideal solenoid, which is given by:

B = μ₀ × n × I

Where B is the magnetic field, μ₀ is the permeability of free space (4π x 10⁻⁷ T*m/A), n is the number of turns per unit length (5000 turns/1.3 m = 3846.2 turns/m), and I is the current flowing through the solenoid (0.8 A).

Substituting the given values into the formula, we have:

B = (4π x 10⁻⁷ T×m/A) × (3846.2 turns/m) × (0.8 A)

B ≈ 2.4 x 10⁻² T

Therefore, the magnitude of the magnetic field inside the solenoid is approximately 2.4 x 10⁻² tesla.

To know more about solenoid, refer here:

https://brainly.com/question/9535280#

#SPJ4

the AU provides a consistent and convenient unit of measurement for comparing distances within our solar system.

The AU, or astronomical unit, is defined as the average distance between the Earth and the Sun because the distance between the two celestial bodies can vary due to their elliptical orbits. By taking the average distance, it provides a more consistent and standard unit of measurement for astronomical distances within our solar system. This allows for easier comparisons and calculations of distances between planets, moons, and other objects in relation to the Earth and the Sun.

to know more about, elliptical orbits visit

https://brainly.com/question/13800169

#SPJ11

An example of how music involves some aspects of subjectivity or individual perception, which can’t be adequately described or explained by physics is the experience of listening to music

Music is a form of art that is highly subjective, and different people have different opinions on what is good music. Therefore, it is difficult to explain the individual perception of music in terms of physics, this is because physics deals with quantifiable, objective measurements and formulas that are used to describe the physical world. A good example of how music involves aspects of subjectivity or individual perception is the experience of listening to music. Every person perceives music differently, and what one person considers to be a beautiful melody may not resonate with another person, this is because music is more than just the sounds that are produced; it involves emotions, memories, and personal experiences that are unique to each individual.

Because music is subjective, it is challenging to describe or explain it adequately in terms of physics. While physics can explain how sound waves are produced, how they travel, and how they are perceived by the human ear, it cannot account for the emotional response that music evokes in people. Therefore, it is essential to recognize that music is a complex art form that cannot be fully understood or explained by science or physics.

Learn more about sound waves at

https://brainly.com/question/18534026

#SPJ11

The magnitude of the acceleration of the 3.00 kg mass is 6.54 m/s².

Since the system is connected by a string passing over a pulley, both masses have the same acceleration. We can find the acceleration by analyzing the forces acting on the masses. For the 3.00 kg mass, the only force acting on it is its weight, which is 29.4 N (3.00 kg x 9.8 m/s²).

For the 6.00 kg mass, its weight component acting parallel to the incline is 58.8 N (6.00 kg x 9.8 m/s² x sin(30°)). Since there is no friction, there is no force acting perpendicular to the incline. Using Newton's second law, we can set up an equation: 29.4 N = (6.00 kg x 9.8 m/s²)sin(30°) - T, where T is the tension in the string.

Solving for T, we get 48.5 N. Since both masses have the same acceleration, we can use the equation F = ma and plug in the values we found for T and the 3.00 kg mass's weight. Solving for a, we get 6.54 m/s².

Learn more about tension here:

https://brainly.com/question/30037765

#SPJ11

To maintain static equilibrium, the force required to hold a 100 lb weight is also 100 lb. This ensures that the sum of the forces acting on the weight is zero, balancing the downward force of gravity.

The force required to hold the weight in static equilibrium can be determined by calculating the weight of the object. The weight of an object is given by the equation:

Weight = mass * acceleration due to gravity

In this case, the weight is given as 100 lb. However, since the weight is already specified in pounds (lb), we don't need to convert it further. The acceleration due to gravity is approximately 32.2 ft/s².

Weight = mass * acceleration due to gravity

100 lb = mass * 32.2 ft/s²

To find the mass, we rearrange the equation:

mass = 100 lb / 32.2 ft/s²

mass ≈ 3.105 lb·s²/ft

Now, since we are considering static equilibrium, the force required to hold the weight in equilibrium is equal to its weight. Thus, the force required is approximately:

Force = 100 lb

Therefore, the force required to hold the 100 lb weight in static equilibrium is approximately 100 lb.

To know more about static equilibrium, refer here:

https://brainly.com/question/3407536#

#SPJ4

A(n) "open system" interacts and has exchanges with elements in its environment.

In the context of systems and their interactions, an open system refers to a system that can exchange matter, energy, or information with its surroundings. This means that an open system can receive inputs from its environment, process them internally, and produce outputs back into the environment.

Examples of open systems in various domains include living organisms, ecosystems, industrial processes, and communication networks. These systems are characterized by their ability to interact, exchange materials or energy, and be influenced by external factors. The concept of an open system is widely used in fields such as physics, biology, ecology, and engineering to understand and analyze the behavior of complex systems that are not isolated from their surroundings.

Learn more about open system here:

https://brainly.com/question/28891854

#SPJ11

The ball will have traveled 85% of its total distance on the 6th bounce.

What is Distance?

Distance is a numerical measurement that quantifies the spatial separation between two objects or locations. It represents the length of the path between two points in physical space. Distance is a fundamental concept used in various fields, including physics, mathematics, geography, and everyday life.

In physics, distance is often described as a scalar quantity, meaning it is specified by its magnitude (size) but not by a particular direction. It is commonly measured in units such as meters (m), kilometers (km), miles (mi), or any other unit of length.

Let's analyze the distances traveled by the ball on each bounce:

First bounce: The ball falls from a height of 10 feet, so it travels 10 feet.

Second bounce: The ball bounces to 80% of its previous height, which is 10 feet × 0.8 = 8 feet. The total distance traveled after the second bounce is 10 feet + 8 feet = 18 feet.

Third bounce: The ball bounces to 80% of its previous height, which is 8 feet × 0.8 = 6.4 feet. The total distance traveled after the third bounce is 18 feet + 6.4 feet = 24.4 feet.

Continuing this pattern, we can calculate the total distance after each bounce:

Fourth bounce: 24.4 feet + 5.12 feet = 29.52 feet

Fifth bounce: 29.52 feet + 4.096 feet = 33.616 feet

Sixth bounce: 33.616 feet + 3.2768 feet = 36.8928 feet

The ball will have traveled 85% of its total distance when it reaches a distance of 36.8928 feet × 0.85 = 31.35948 feet. Since the sixth bounce exceeds this distance, the ball will have traveled 85% of its total distance on the 6th bounce.

Therefore, the ball will have traveled 85% of its total distance on the 6th bounce.

To know more about distance, refer here:

https://brainly.com/question/29769926#

#SPJ4

a)  The magnitude of the force of gravity that the orange exerts on the apple is approximately 3.55 x 10^-10 N.

b)   The magnitude of the force of gravity that the apple exerts on the orange is also approximately 3.55 x 10^-10 N.

According to the law of universal gravitation, the force of gravity between two objects is given by:

F = G * (m1 * m2) / r^2

where F is the force of gravity, G is the gravitational constant (6.674 x 10^-11 N*m^2/kg^2), m1 and m2 are the masses of the objects, and r is the distance between their centers of mass.

(a) To find the magnitude of the force of gravity that the orange exerts on the apple, we can plug in the values:

m1 = 0.12 kg (mass of apple)

m2 = 0.20 kg (mass of orange)

r = 0.75 m (distance between them)

F = G * (m1 * m2) / r^2

F = 6.674 x 10^-11 * (0.12 kg * 0.20 kg) / (0.75 m)^2

F = 3.55 x 10^-10 N

Therefore, the magnitude of the force of gravity that the orange exerts on the apple is approximately 3.55 x 10^-10 N.

(b) By Newton's third law, the force of gravity that the apple exerts on the orange is equal in magnitude but opposite in direction to the force of gravity that the orange exerts on the apple. Therefore, the magnitude of the force of gravity that the apple exerts on the orange is also approximately 3.55 x 10^-10 N.

Learn more about gravitation here:

#SPJ11

The final charge on object 2 is (q1/2) + q2, which corresponds to option d) 92 + 2.

In an isolated system, the total charge remains constant. Initially, the system has charges q1 and q2 on objects 1 and 2, respectively. When object 1 loses half of its charge, its new charge becomes q1/2. To determine the final charge on object 2, we can use the principle of charge conservation.

Initial total charge = Final total charge
q1 + q2 = (q1/2) + q2_final

Solving for q2_final:
q2_final = q1 + q2 - (q1/2)
q2_final = (q1/2) + q2

To know more about final charge visit :-

https://brainly.com/question/30514270

#SPJ11

To determine the distance traveled by the radar wave, we can use the formula: distance = speed × time

2.50 × 10^-5 s

distance = (3.00 × 10^8 m/s) × (2.50 × 10^-5 s)

= 7.50 × 10^3 m

The speed of the radar wave is the speed of light, which is approximately 3.00 × 10^8 meters per second.

Converting the time to seconds:

2.50 × 10^-5 s

Now we can calculate the distance:

distance = (3.00 × 10^8 m/s) × (2.50 × 10^-5 s)

= 7.50 × 10^3 m

Since the question asks for the distance in kilometers, we can convert the distance from meters to kilometers:

distance = 7.50 × 10^3 m / 1000

= 7.50 km

Therefore, the radar wave traveled a distance of 7.50 km from the radar to the airplane and back to the radar receiver.

Learn more about wave here

https://brainly.com/question/26116832

#SPJ11

Answer: The extension of the spring when a mass of 30g is hung from it is approximately 1.29 cm.

Explanation: Hooke's Law states that the extension of a spring is directly proportional to the force applied to it, as long as the elastic limit of the spring is not exceeded. The formula for Hooke's Law is:

F = k * x

Where: F is the force applied to the spring k is the spring constant (a measure of the stiffness of the spring) x is the extension of the spring

To find the extension when a mass of 30g is hung from the spring, we need to determine the spring constant first. We can use the given information to calculate it.

Given: Mass = 20g Extension = 0.86cm = 0.86/100 = 0.0086m (converting cm to meters)

We know that weight (force) is equal to mass times acceleration due to gravity:

F = m * g

Where: F is the force (weight) m is the mass g is the acceleration due to gravity (approximately 9.8 m/s²)

Substituting the given values:

F = (20g) * (9.8 m/s²) = 0.02kg * 9.8 m/s² = 0.196 N

Now we can calculate the spring constant:

0.196 N = k * 0.0086 m

k = 0.196 N / 0.0086 m ≈ 22.79 N/m

With the spring constant determined, we can now calculate the extension when a mass of 30g is hung from the spring:

Mass = 30g Weight = (30g) * (9.8 m/s²) = 0.03kg * 9.8 m/s² = 0.294 N

Using Hooke's Law:

0.294 N = (22.79 N/m) * x

Solving for x:

x = 0.294 N / 22.79 N/m ≈ 0.0129 m

Converting the result to centimeters:

x ≈ 0.0129 m * 100 = 1.29 cm

Therefore, the extension of the spring when a mass of 30g is hung from it is approximately 1.29 cm.

To know more about Hooke's law ,

brainly.com/question/32494074

The options that describe waves are "transverse," "longitudinal," "electromagnetic," and "sound." "Heat" is not a type of wave but a form of energy transfer.

To determine the type of wave used, it's important to understand each term mentioned:
1. Transverse waves: The particles of the medium move perpendicular to the direction of the wave's energy.
2. Longitudinal waves: The particles of the medium move parallel to the direction of the wave's energy.
3. Heat waves: These are not a specific type of wave, but rather a transfer of energy through a medium, typically via conduction, convection, or radiation.
4. Electromagnetic waves: These are transverse waves that do not require a medium and include light, radio waves, and X-rays.
5. Sound waves: These are longitudinal waves that require a medium (such as air or water) to propagate.
To know more about wave's energy, visit:

https://brainly.com/question/28795154

#SPJ11

Answer:

If the work is done by the system then the internal energy of the system will decrease.

Explanation:

Given that work is being done in an adiabatic system, does the internal energy in the system increase or decrease?

An adiabatic process is a thermodynamic process in which there is no heat flow going in or out of a system.

We can use the first law of thermodynamics to answer the question. The first law of thermodynamic is a restatement of energy conservation. Energy is not created or destroyed it is simply transformed into other forms of energy. We can summarize this law in the following equation(s).

[tex]\boxed{\left\begin{array}{ccc}\text{\underline{The First Law of Thermodynamics:}}\\\\\Delta E_{int.}=Q+W_{on}\\ \text{or}\\\Delta E_{int.}=Q-W_{by}\end{array}\right}[/tex]

Since no heat is being exchanged between the system and its surroundings. We can say that Q=0 J. Substituting this in we have...

[tex]\Delta E_{int.}=Q+W_{on} \ \text{or} \ \Delta E_{int.}=Q-W_{by}\\\\\Longrightarrow \Delta E_{int.}=0+W_{on} \ \text{or} \ \Delta E_{int.}=0-W_{by} \\\\\therefore \boxed{\Delta E_{int.}=W_{on} \ \text{or} \ \Delta E_{int.}=-W_{by}}[/tex]

Thus, in an adiabatic process the change in internal energy is solely determined by the work done on or by the system. So we can conclude that the internal energy increases if the work is done on the system or that the internal energy decreases if the work is done by the system.

In the case of this question it is asking about work done by the system.

∴ If the work is done by the system then the internal energy of the system will decrease.

In an adiabatic process, if work is done by a system, the internal energy of the system decreases.

An adiabatic process is a thermodynamic process where no heat is exchanged between the system and its surroundings. In such a process, the change in internal energy (ΔU) of the system is equal to the work (W) done by the system.

According to the first law of thermodynamics, ΔU = Q - W, where Q represents heat and W represents work. Since the process is adiabatic, Q = 0, and the equation simplifies to ΔU = -W.

If work is done by the system (W > 0), the change in internal energy (ΔU) will be negative, indicating a decrease in internal energy. This means that the system loses energy as work is done on its surroundings.

Conversely, if work is done on the system (W < 0), the change in internal energy (ΔU) would be positive, indicating an increase in internal energy.

However, in an adiabatic process, where no heat exchange occurs, work done by the system is typically associated with a decrease in internal energy.

To know more about thermodynamic, refer here:

https://brainly.com/question/1368306#

#SPJ4

The error in the estimate of acceleration due to gravity (g) is approximately -0.02π(T√(Lg)).

The formula for the period of a simple pendulum is given by:

T = 2π√(L/g)

Where:

T is the time period of the pendulum

L is the length of the pendulum

g is the acceleration due to gravity

Taking the derivative of the equation with respect to g:

d(T)/d(g) = -πL/(T√(L/g))

Using the concept of error propagation, the relative error in g (Δg/g) can be calculated as:

(Δg/g) = (ΔT/T) / (d(T)/d(g))

Substituting the given values into the equation:

(Δg/g) = (0.02) / (-πL/(T√(L/g)))

(Δg/g) = -0.02π(T/g)(√(L/g))

To obtain the absolute error in g, we can multiply the relative error by the estimated value of g:

Error in g (Δg) = (Δg/g) * g

Error in g (Δg) = (-0.02π(T/g)(√(L/g))) * g

Error in g (Δg) = -0.02π(T√(Lg))

Note that the negative sign indicates a decrease in the estimate of g due to the errors in length and time period.

Learn more about  error here:

https://brainly.com/question/31961227

#SPJ11

The speed of the reference frame in which the two events occur at the same coordinate is 166.67 m/s.

To determine the speed of the reference frame in which the two events occur at the same coordinate, we need to use the concept of relative velocity.
Let's assume that the two events are A and B, and A occurs first followed by B. We know that the distance between A and B is 100 m and the time interval between them is 0.60 s.
Now, let's consider a reference frame in which the two events occur at the same coordinate. In this frame, the distance between A and B is zero, and the time interval between them is also zero.
Therefore, we need to find the velocity of this reference frame relative to the original frame in which the events occurred. We can use the formula:
Velocity = Distance / Time
In the original frame, the velocity between A and B is:
Velocity = Distance / Time = 100 m / 0.60 s = 166.67 m/s
Now, to find the velocity of the reference frame in which the two events occur at the same coordinate, we need to subtract the velocity of this frame from the velocity between A and B:
Velocity of reference frame = Velocity between A and B - Velocity of A relative to the reference frame
Since A and B occur at the same coordinate in the reference frame, the velocity of A relative to the reference frame is zero. Therefore, we get:
Velocity of reference frame = 166.67 m/s - 0 m/s = 166.67 m/s
To know more about reference frame, visit:

https://brainly.com/question/28090617

#SPJ11