Select the correct answer. when a small star dies, which of these celestial objects is it most likely to help create? a. a planet b. a star c. a moon d. a meteor e. a comet

The speed of the aircraft with a narrow strip heater attached = 370.97 m/s

The distance of the strip heater attached to the wing from the leading

edge, x = 0.01 m

Heat flux, q = 300 W/m²

The temperature difference between the heater and surrounding air,

ΔT = 1°C

The properties of the air are

   The density of air, ρ = 1 kg/m³

   Specific heat at constant pressure, CP = 1 kJ /kg K

   Thermal conductivity, k = 0.02 W/mk

   Viscosity, ν = 1.5 x 10⁻⁵ m²/s

Dynamic viscosity,

                                μ = ρ.ν

                                   = 1 x 1.5 x  10⁻⁵

                                  = 1.5 x  10⁻⁵ N s / m²

Prandtl number,

                         [tex]\displaystyle P_r =\frac{\mu. CP}{k}[/tex]

                              = 1.5 x 10⁻⁵ x 1 x 10³ / 0.02

                              = 0.75

Heat flux,

               q = hₓ ΔT

           300 =  hₓ x 1

              hₓ  = 300 W / m² C

So, the local Nusselt number is

                      [tex]\displaystyle Nu_x = 0.332 Re_x^{1/2} P_r^{1/3}[/tex]

                      [tex]\displaystyle \frac{h_x.x}{K} = 0.332 \frac{v.x}{\nu}^{1/2}P_r^{1/3}[/tex]

    where v is the velocity of the aircraft

                        [tex]\displaystyle\frac{300 * 0.01}{0.02} = 0.332 \left( \frac{v*0.01}{1.5 * 10^{-5}}\right)^{1/2} (0.75)^{1/3][/tex]

By further simplifying, we get

                          150 = 0.332 x 0.9085 x 25.82 x [tex]v^{1/2}[/tex]

                              v = 370.97 m/s

Therefore, the speed of the aircraft is 370.97 m/s

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The resultant distance of the vector is 12.1 m and the angle between two vectors are 48.4°. So the x-component of this vector is, Aₓ = 8.0335 m

Vector is a product that means a parameter has two types of property one is value second is direction. If a parameter has both then it called a vector quantity. Example: Velocity.

To calculate the vector we know first this is a proper vector quantity or not. According to the question, this is a vector quantity. So it has two component, one along x axis another is y axis as shown in the picture.

We have to calculate the x-component, so we are using the formula is,

Aₓ = Acosθ

Here we are given,

A = The resultant distance of the vector = 12.1 m

θ= The angle between two vectors = 48.4°.

Now We have to calculate the x-component = Aₓ

Now we put the known values in the above equation, we get

Aₓ = Acosθ

Or, Aₓ = 12.1*cos(48.4°)

Or, Aₓ = 8.0335 m

According to the calculation we get, the x-component of this vector is, Aₓ = 8.0335 m

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Answer:

Explanation:

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The gas that makes up this layer is O3 (Ozone).

The ozone layer protects the earth from most of the sun's UVB rays. Greenhouse gases are a set of gases that accumulate in the lower layer of the atmosphere the troposphere and absorb infrared radiation to increase the average temperature of the Earth's surface. At the top of the stratosphere, 30 miles up, ozone absorbs most of the sun's harmful UV rays.

At the top of the troposphere 12 miles, up ozone acts as a greenhouse gas and traps heat. The troposphere is the lowest layer of the Earth's atmosphere. Most of the atmospheric mass is in the troposphere. Most types of clouds are in the troposphere, and almost all weather phenomena occur in this layer. Greenhouse gases are so named because they absorb infrared radiation from the sun in the form of heat which circulates in the atmosphere and is eventually lost to space.

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The temperature of steel would increase compared to the pound of water when certain specific amount of heat were absorbed by both .

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Three solid, uniform, cylindrical flywheels with a radius of 1.47 m and a mass of 65.0 kg each rotate. The system's net angular momentum is 297.77 298 kg m2 / s in size.

I is the moment of inertia.

W = angular momentum L = angular velocity

I = 1/2 MR^2

I = 1/2 (65)(1.47^2)

I = 70.23

Moment of Inertia times Angular Velocity equals L.

In the same direction, two of the fly wheels turn.

L = 2I(W1) - I(W2) (W2)

L = 2*70.23(3.83) - 70.23(3.42) (3.42)

L = 297.77 ≈ 298 kg m^2 / s

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The name of the theory that describes the history and fate of the universe is the big bang theory.

The most influential theory of the origin of the universe at present is the so-called Big Bang theory. According to this theory, the universe was formed when a very hot dense fireball exploded, blowing matter outward. The consensus among scientists, astronomers, and cosmologists is the universe as we know it.

It was created in a massive explosion that determined not only most of the matter but also the physical laws that govern our ever-expanding universe about it. This is known as the Big Bang Theory. The most widely held theory of the origin of the universe is called the Big Bang theory. This argues that the universe began as a near-single point with near-infinite temperature and density. Since then the universe has continued to expand.

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The correct answer is option c, speed.

Speed is the rate at which someone or something moves or operate. It is measured by the velocity and time.

Velocity is the total distance in total time taken.

Speed tells the amount of energy absorbed by the vehicle. The energy is used in the movement of the vehicle and it also helps the vehicle to move accordingly.

Speed is the major factor that helps to protect the occupants.

It is speed only that we can adjust a according to the situation. This also keeps the vehicle in control. It is the main factor in any vehicle that causes the vehicle to move and also it helps to keep it in control as well. Other controls are the supporting factors that helps to keep the speed in control.

Be it the weather, the climate, roads or traffic, it is speed that helps to keep the occupants safe.

Therefore, Speed  is a major factor in dictating how much energy the vehicle can absorb to protect the occupants

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The magnitude of the Gravitational Force between the Sun and The earth is nearly 3.557 x 10²² Newtons.

The total gravitational force between two objects is given by the formula,

F = GMm/R²

G is the universal gravitational constant and it's value is 6.67408x10⁻¹¹

M is the mass of one body,

m is the mass of the other body,

R is the centre to centre distance between the two objects,

Here,

Mass of sun is 1.989x10³⁰ kg and the mass of earth is 5.974x10²⁴.

The centre to centre distance R of sun and earth  = (Radius of earth + distance between the sun's centre and earth's surface)

So,

R = (1.49x10¹¹ + 6.378x10⁶)m

Now, putting all the values in the formula,

F = (6.67408x10⁻¹¹)(1.989x10³⁰)(5.974x10²⁴)/(1.49x10¹¹ + 6.378x10⁶)²

Solving further,

F = 3.557 x 10²²N

So, the gravitational force between sun and earth is 3.557 x 10²²N.

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The displacement on x-axis is 75 cm and the distance that moved by the child is 80 cm

We are given that,

Starting point of child = d₁ = 10cm

Reaching point of the child = d₂ = 70cm

Move back = 5cm

Therefore, total distance covered by a child can be given as,

Δd = 10cm + 70 cm = 80 cm

Thus, the total distance is 80cm and a child moves back 5cm then the displacement would be given as,

Displacement = total distance cover - distance move back

Displacement = 80cm - 5 cm = 75 cm

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The speed of ball #2 after the collision will be 4.5 m/s.

Given,

The mass of ball 1 = 6kg

The mass of ball 2 = 4 kg

Initial speed of ball 1 = 5 m/s

Final speed of ball 1 = 2 m/s

Initial speed of ball 2 = 0 m/s

Let us suppose the final speed of ball 2 is x m/s.

We know that, from the conservation of momentum theorem:

m1.v1(initial) + m2.v2(initial) = m1.v1(final) + m2.v2(final)

6.5 + 4.0 = 6.2 + 4.x

30 + 0 = 12 + 4x

=>4x = 18

=> x = 4.5 m/s

Thus the speed of 2nd ball after the collision will be 4.5 m/s.

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Physical property- color, density, melting point, boiling point, hardness Chemical property- neutralizes an acid, reacts with base to form water, reacts with water to form gas, neutralizes a base, flammability.

A quality of matter that is unrelated to a change inside its chemical makeup is called a physical property. Density, colour, hardness, melting & boiling points, and conductivity are a few common instances of physical qualities.

Without altering the makeup of the substance, physical qualities can be seen or quantified. In order to observe and describe matter, physical attributes are used. The following are only a few examples of physical characteristics: appearance, texture, colour, smell, melting and boiling points, density, solubility, polarity, and many more.

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Due to air friction different mass configurations show the same physics of  non-conservation.

Momentum in an easy way is an amount of motion. right here quantity is measurable because if an item is transferring and has mass, then it has momentum. If an item no longer passes then it has no momentum. but, in normal lifestyles, it has significance but many humans did not understand it.

Momentum may be described as "mass in motion. All items have mass; so if an item is transferring, then it has momentum - it has its mass in motion. the quantity of momentum that an item has relies upon two variables.

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A moving item possesses kinetic energy. If we want to accelerate an object, we must exert a force. Applying force requires effort on our part. Once the process is complete and energy has been transferred to the item, it will begin to move at a new constant speed.

Kinetic energy is the energy that an object has as a result of motion. It is defined as the work required to accelerate a mass-determined body from rest to the indicated velocity. Unless its speed changes, the body retains the kinetic energy it gained during acceleration.

Using the formula - K.E. = 1/2 × m × v²

K.E. = 1/2 × 0.4 × 20²

K.E. = 80 kg m/s²

The energy of motion is called kinetic energy, and it can be observed in the movement of an object, particle, or group of particles. Any moving object, such as a person walking, a baseball being thrown, food falling off a table, or a charged particle in an electric field, utilizes kinetic energy.

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The time taken by the projectile to hit the floor is 0.55 s.

The projectile motion refers to the motion of an object or particle that is launched into a gravitational field, such as from the surface of the Earth, and travels along a curved path while only being influenced by gravity. A body is considered to be in projectile motion if it moves both vertically and horizontally (trajectory) from the point of flight to the point of landing.

This indicates that the projectile is initially thrown at a height of 1.5 meters and a speed of 80.0 meters per second.

Since the bullet is launched horizontally, the initial vertical velocity component is zero. Just figure out how long it takes something to fall 1.5 meters from a seated position. The 80 m/s is only important if you want to know where it will land on the ground. It has no bearing on the situation. We might be led to the fundamental Newtonian equation:

hf = v₀t + (a/2)t² + h₀

Here, h stands for height, v for speed, and a for acceleration. It might be difficult to resolve this for t in some circumstances, however since

v₀ = 0, this one is easy.

0 = (-9.8/2)t² + 1.5

-1.5 = -4.9t²

-1.5/-4.9 = t²

0.55 s = t

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Constellation is a group of stars that appears to form a pattern or picture. Some of the constellations include Orion, Taurus, Canis Major etc.

Orion is located on the celestial equator and it can be seen throughout the world. This constellation is named after the hunter, in Greek mythology. It is one of the most obvious and recognizable constellations in the sky. Orion is most visible in the evening sky from January to April, during winter season in the Northern Hemisphere, and summer season in the Southern Hemisphere. In the tropics, the constellation moves at the zenith. Orion is bordered by Taurus to the northwest, and by other constellations in other directions.

Taurus is one of the constellations of the 12 zodiac signs. It is a large and prominent constellation in the Northern Hemisphere during winter. It is one of the oldest constellations. The International Astronomical Union gave a three-letter abbreviation for the constellation, as "Tau". During late November-early December, Taurus occupies a furthest point from the Sun and is visible the entire night. By late March, it sets at sunset and completely disappears behind the Sun's glare from May to July.

Canis Major is a constellation in the southern celestial hemisphere. It is a Latin name, which means 'greater dog' in contrast to 'Canis Minor' meaning 'lesser dog'. These both figures are commonly represented as following the constellation of Orion, the hunter, through the sky. Canis Major contains Sirius, the brightest star in the night sky, known as the "dog star". It is bright because of its proximity to the Solar System.

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Given data

*The given mass of the car is m = 1610 kg

*The given effective force constant is k = 5.75 × 10^4 N/m

(a)

The formula for the period of oscillation of a 1610 kg car is given as

Substitute the known values in the above expression as

Hence, the time period of oscillation of a 1610 kg car is T = 1.05 s

(b)

As from the given data, the amplitude of the oscillation of the car decreases by a factor of 5.00. Then, the expression for the amplitude of the oscillation, and the damping constant (b) is calculated as

Substitute the known values in the above expression as

Hence, the damping constant is b = 9871.2 kg/s

Gravitational potential energy is converted to kinetic (Motion) energy when the object begins to move.

The energy gained from this change in position is stored within the body as gravitational potential energy if a ball is raised from the ground to a height above the earth. The gravitational potential energy is then converted into kinetic energy when the ball hits the earth.

Therefore, the way an object falls, its gravitational potential energy is said to be transformed or altered  into the kinetic energy of motion.

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If two covalently bonded atoms move closer than a distance of the bond length, the potential energy of the atoms increases

Stronger bonds have lower potential energy than weaker ones. The weaker connection has a higher potential energy. Ionic bonds are stronger than covalent ones, hence covalent bonds have higher potential energy.

The tremendous repulsive interactions between the positively charged nuclei of the bound atoms cause the energy of the system to dramatically rise if the atoms move closer to one another than the ideal bond distance.

If there is an attractive force between the two, the potential energy will rise with more separation, but if there is a repulsive force, the potential energy will fall with greater separation.

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The average atomic mass of lanthanum that has an isotope with an atomic mass of 138.9 amu and an abundance of 99.9 1% and a second isotope with an atomic mass of 137.9 amu and an abundance of 0.09 % is

Average atomic m = Sum of product of atomic m and % abundance /  100

For isotope 1,

Atomic mass = 138.9 amu

% abundance = 99.91 %

For isotope 2,

Atomic mass = 137.9 amu

% abundance = 0.09 %

Average atomic mass = ( 138.9 * 99.91 ) + ( 137.9 * 0.09 ) / 100

Average atomic mass = 13877.5 + 12.41 / 100

Average atomic mass = 138.9 amu

The average atomic mass or average atomic weight of an element is the weighted average mass or weight of atoms in a naturally occurring sample ( i.e., isotopes ) of the element.

Therefore, the average atomic mass of lanthanum is 138.9 amu

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The formula relating kinetic energy and momentum of a particle is expressed as

KE = p^2/2m

let the actual momentum be p. Since the error measurement is 10%, the measurement of the momentum would be

p + 0.1p = 1.1p

Percentage error in the measurement of the kinetic energy is obtained by the formula,

% error = (KEf - KEi)/KEi x 100

where

KEf is the final kinetic energy measured error

KEi is the initial kinetic energy measured without error

Thus,

% error = [(1.1p)^2/2m - p^2/2m)]/p^2/2m x 100

% error = p^2/2m(1.1^2 - 1)/(p^2/2m) x 100

% error = 100(1.1^2 - 1)

% error = 21%

A force of 2.0 × 10² newtons is applied to a lever to lift a crate. If the mechanical advantage of the lever is 3.43, then the weight of the crane would be 686 Newtons.

Mechanical advantage is defined as a measure of the ratio of output force to input force in a system, It is used to analyze the forces in simple machines like levers and pulleys.

Mechanical advantage = output force(load) /input force (effort)

As given in the problem a  force of 2.0 × 10² newtons is applied to a lever to lift a crate. If the mechanical advantage of the lever is 3.43,

The weight of the crane = 200 × 3.43

                                        = 686 Newtons

Thus, the weight of the crane would be 686 Newtons.

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The cat began its journey in bed and ended its journey 10 meters to the right of its bed.

Journey is an act of travelling from one place to another.

The cat wakes up in its bed and visits its food dish to the left of its bed.

Time (m) 1, 2, 3, 4, 5

Position (m) 0, 2, 4, -5, -10

The above time table shows that the journey of the cat starts from the moment it wakes up in the bed as the timer starts the moment the cat wakes up and ends at 10 in negative direction i.e. to the right side of the bed.

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Answer:

a pipe, ditch, ship or factory smokestack.”

Explanation:

The U.S. Environmental Protection Agency (EPA) defines point source pollution as “any single identifiable source of pollution from which pollutants are discharged, such as a pipe, ditch, ship or factory smokestack.” Factories and sewage treatment plants are two common types of point sources.

Given:

The angular displacement, θ=89.5°

Initial angular velocity, ω₀=47.8 rpm

Final angular velocity, ω=0 rad/s

To find:

The angular acceleration of the wheel.

Explanation:

The angular velocity can be converted to rad/s as,

The angle is converted into the radians as,

From the equation of motion,

Where α is the angular acceleration of the wheel.

On substituting the known values,

Final answer:

Thus the angular acceleration of the wheel is -8.01 rad/s²

The specific heat capacity, abbreviated with C the letter , is the quantity of energy required to change the temperature of One gram of an object by 1

The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).

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Both technicians A and B are correct. Hence, option C.

An ammeter is used to measure the electrical current in the circuit. An ammeter should be placed into series with the circuit being tested.

The ammeter can be connected either on the power side or on the ground side of the motor but the only condition is it should be connected in the series.

Internal resistance refers back to the opposition to the float of cutting-edge supplied by using the cells and batteries themselves ensuing inside the era of heat. internal resistance is measured in Ohms. the connection among inner resistance (r) and emf (e) of cell s given through. e = I (r + R)

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Disclaimer:- your question is incomplete, please see below for the complete question.

The circuit breaker that protects a power window circuit opens whenever the window is lowered. technician a says the internal resistance of the motor is too high. technician b says the window regulator may be sticking causing high mechanical resistance. who is correct?

A. A only

B. B only

C. Both A and B

D. Neither A nor B

Answer:

The ball swings to the outside of the curve (assuming that the road is level.)

Explanation:

Assume that the air resistance on the ball in this question is negligible. The only forces acting on this ball will be tension that the string exerts on this ball and the weight of the ball.

Since the ball is in a centripetal motion, the net force on this ball will point directly to the center of the curve.

Refer to the diagram attached. The net force on this ball is the vector sum of weight and tension. Since weight points downwards, tension will need to point upwards to balance weight and toward the center of the curve, so that resultant force points horizontally toward the center of the curve.

The tension on the ball points along the string away from the ball (toward the ceiling.) For the tension that the string exerts on this ball to point toward the center of the curve and upwards, the ball will need to swing away from the center of the curve (as show in the diagram.)

Therefore, the ball will swing towards the outside of the curve (away from the center of the curve.)

Answer:

[tex]3 \times 47 = [/tex]

141

The fact that voyager travels in space is an example of Newton's First Law of Motion.

What are Newton's Laws of Motion?

Newton's laws of motion are three basic laws of classical mechanics that describe the relationship between the motion of an object and the forces acting on it. These laws can be paraphrased as follows:

When the voyager was launched, it was already moving forward in motion. So, because of the Newton's First law of motion the voyager remained in motion as there is no air friction present in the space to stop its motion.

Thus, this situation is an example of Newton's First law of motion.

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