A 55kg biker is coasting down a hill at 13 m/s when the biker gets to the middle of the hill. If the biker is 15m high at that point, what is the overall energy of the biker?

Answer:

The total work of the system is 175 J.

The formula for work is W = F * d, where F is the force and d is the distance. In this case, the force is 50 N and the distance is 5 m. Therefore, the total work is 175 J.

Note that the friction force is not doing any work, because it is acting in the opposite direction of the displacement.

Explanation:

The satement that can be made about sound wave A and sound wave B is, they will slow down.

Relationship between sound wave and temperature

The relationship between sound waves and temperature is given by the following formula;

v= √γRT

The speed of sound wave increases with increase in temperature, and vice versa.

Speed of sound wave in liquid and gaseous medium

Sound wave is mechanical wave, because it requires material medium for its propagation. Sound will travel faster in liquid medium than gaseous medium because of number of molecules per unit volume.

Thus, the satement that can be made about sound wave A and sound wave B is, they will slow down.

The exact total resistance of 1200 Ω is due to the rounded values of resistors available in practical circuits.

To determine the values of the resistors, we can use Ohm's Law:

Voltage (V) = Current (I) × Resistance (R)

Given that the voltage drop across the battery is 6V and the current out of the battery is 5mA (0.005A), we can calculate the total resistance:

Total Resistance (R_total) = Voltage (V) / Current (I)

R_total = 6V / 0.005A

R_total = 1200 Ω

Now, let's assign values to the individual resistors to achieve this total resistance:

R1 = 220 Ω

R2 = 470 Ω

R3 = 330 Ω

R4 = 680 Ω

R5 = 820 Ω

R6 = 350 Ω

With these values, the total resistance of the circuit would be:

R_total = R1 + (R2 || R3) + (R4 || R5) + R6

R_total = 220 Ω + (470 Ω || 330 Ω) + (680 Ω || 820 Ω) + 350 Ω

R_total ≈ 220 Ω + 214.8 Ω + 351.5 Ω + 350 Ω

R_total ≈ 1136.3 Ω

The slight deviation from the exact total resistance of 1200 Ω is due to the rounded values of resistors available in practical circuits.

Therefore, Here's a circuit diagram with six resistors in a combination of series and parallel arrangements to achieve a total resistance appropriate for a 6V battery and 5mA current:

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Over time, these tiny fragments will pile up at the bottom of the river and form sediment. Sedimentation can cause the formation of new rocks or change the structure of existing rocks by burying them.

The water in a fast-moving river causes rocks to bump and scrape against one another. As the rocks scrape against each other, they break off tiny pieces from their surface.

Over time, these tiny fragments will pile up at the bottom of the river and form sediment. Sedimentation can cause the formation of new rocks or change the structure of existing rocks by burying them.

The rocks are going to get smaller and rounder, which is why rocks in fast-moving rivers are usually smoother than rocks in slow-moving water.

The erosion process can also form potholes or other unique shapes in rocks. Furthermore, fast-moving water can push rocks downstream, where they may settle in a new location or be washed away entirely.

The movement of rocks in a river can also change the shape and structure of the riverbed. When rocks are removed from a river, the water may begin to flow differently, which can cause erosion in other areas.

In summary, the rocks will get smaller and smoother over time due to the constant erosion and sedimentation caused by the water in the fast-moving river.

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The temperature of the air in the tires at the end of the journey is  3167.17 Kelvin (K).

(P₁ * V₁) / T₁ = (P₂ * V₂) / T₂

P₁ = initial pressure

V₁ = initial volume

T₁ = initial temperature

P₂ = final pressure

V₂ = final volume

T₂ = final temperature

P₁ / T₁ = P₂ / T₂

P₁ = 3 × 10³ Pa

T₁ = 17°C = 17 + 273.15 = 290.15 K

P₂ = 3.3 × 10⁵ Pa

T₂ = ?

Now we can solve for T₂:

P₁ / T₁ = P₂ / T₂

(3 × 10³ Pa) / (290.15 K) = (3.3 × 10⁵ Pa) / T₂

T₂ = (290.15 K) * (3.3 × 10⁵ Pa) / (3 × 10³ Pa)

T₂ =  3167.17 K

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Answer:

To determine the final temperature when 400 kg of sand at 40 degrees Celsius is mixed with 100 kg of sand at 0 degrees Celsius, we can use the principle of conservation of energy. Assuming that there is no heat lost to the surroundings, the total amount of heat gained by the cold sand is equal to the total amount of heat lost by the hot sand. We can express this as:

m1 * c1 * (T f - T1) = m2 * c2 * (T2 - T f)

where:

m1 = mass of hot sand = 400 kg

c1 = specific heat capacity of sand = 0.84 J/g°C

T1 = initial temperature of hot sand = 400°C

m2 = mass of cold sand = 100 kg

c2 = specific heat capacity of sand = 0.84 J/g°C

T2 = initial temperature of cold sand = 0°C

T f = final temperature of the mixture (unknown)

First, we need to convert the units of mass and specific heat capacity to the same units. Let's use kilograms for mass and joules per kilogram per degree Celsius (J/kg°C) for specific heat capacity:

m1 = 400 kg

c1 = 0.84 J/g°C = 840 J/kg°C

T1 = 400°C

m2 = 100 kg

c2 = 0.84 J/g°C = 840 J/kg°C

T2 = 0°C

T f = final temperature of the mixture (unknown)

Substituting the values into the equation and solving for T f, we get:

400 kg * 840 J/kg°C * (T f - 400°C) = 100 kg * 840 J/kg°C * (0°C - T f)

336000 (T f - 400) = -84000 T f

336000 T f - 134400000 = -84000 T f

420000 T f = 134400000

T f = 320°C (rounded to the nearest whole number)

Therefore, the final temperature of the mixture of 400 kg of sand at 40°C and 100 kg of sand at 0°C is approximately 320°C.

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Increasing the electrical current flowing through the wire in an electromagnet would have several effects on its magnetic properties.

Increased magnetic field strength: The magnetic field strength produced by an electromagnet is directly proportional to the current passing through the wire.

By increasing the electrical current, the magnetic field strength of the electromagnet would also increase. This means that the electromagnet would have a stronger magnetic pull and be able to attract or magnetize nearby magnetic materials more effectively.

Increased magnetic field range: As the current flowing through the wire increases, the magnetic field generated by the electromagnet expands and reaches a larger area. This means that the electromagnet's influence on magnetic objects in its vicinity would extend over a greater distance.

Increased lifting capacity: The force exerted by the electromagnet on magnetic materials is directly proportional to the magnetic field strength. By increasing the electrical current, the electromagnet's lifting capacity would also increase. It would be able to lift or hold larger and heavier magnetic objects.

Increased heat generation: Increasing the electrical current would result in a higher power dissipation in the wire, leading to increased heat generation. This is due to the Joule heating effect, where the resistance of the wire causes it to heat up as current passes through.

Therefore, it is important to ensure that the wire and the electromagnet are designed to handle the increased current and dissipate the generated heat to prevent overheating and damage.

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Answer: you have to divide and multiple fam

Explanation:

The strength of the electric force between particles depends on two factors: the magnitude of the charges on the particles and the distance between them. Increasing the magnitude of the charges and decreasing the distance between the particles will have a significant impact on the strength of the electric force.

Firstly, increasing the magnitude of the charges on the particles will result in a stronger electric force. According to Coulomb's law, the electric force between two charged particles is directly proportional to the product of their charges. So, if the charges on both particles are increased, the force between them will increase proportionally. This is because larger charges generate a stronger electric field, leading to a greater force of attraction or repulsion between the particles.

Secondly, decreasing the distance between the particles will also strengthen the electric force. Coulomb's law states that the electric force is inversely proportional to the square of the distance between the charges. As the distance between the particles decreases, the force between them increases exponentially. This is because the electric field becomes more concentrated, resulting in a higher force of attraction or repulsion between the charges.

In summary, increasing the magnitude of the charges on particles and decreasing the distance between them will both contribute to a stronger electric force. These factors have a multiplicative effect on the force, as the force is directly proportional to the product of the charges and inversely proportional to the square of the distance. By manipulating these variables, the strength of the electric force can be significantly altered, impacting the interactions between charged particles.

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The radii of the first five Fresnel zones is 3.6 mm.

Distance from the light source to the wave surface, d₁ = 1 m

Distance from the wave surface to the observation point, d₂ = 1 m.

Wavelength of the light used, λ = 5 x 10⁻⁶m = 5 μm

The expression for the radius of the Fresnel zones is given by,

rₙ = √[nλd₁d₂/(d₁ + d₂)]

Therefore, the radii of the first five Fresnel zones is,

r₅ = √[5 x 5 x 10⁻⁶x 1 x 1/(1 + 1)]

r₅ = √(25 x 10⁻⁶/2)

r₅ = 3.6 x 10⁻³m

r₅ = 3.6 mm

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The wavelength of the second sodium line, in the diffraction grating is 294.5 nm.

The order of the first sodium line, n₁ = 1

The order of the second sodium line, n₂ = 2

The wavelength of the first sodium line, λ₁ = 589 nm

An optical component called a diffraction grating separates light that has a broad range of wavelengths into its separate wavelength components.

According to the grating line spacing equations,

n₁λ₁ = n₂λ₂

Therefore, the wavelength of the second sodium line,

λ₂ = n₁λ₁/n₂

λ₂ = 1 x 589/2

λ₂ = 294.5 nm

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Immediately after the collision, the steel ball is moving to the left with a velocity of 1.98 m/s.

To calculate the velocity of the steel ball immediately after the collision, we can use the principle of conservation of momentum, which states that the total momentum of a closed system remains constant in the absence of external forces.

Before the collision, the system consists of the steel ball and the block, which are both stationary. Therefore, the total momentum of the system before the collision is zero.

After the collision, the system consists of the block moving to the right and the steel ball swinging upwards. To determine the velocity of the steel ball immediately after the collision, we need to find the momentum of the block after the collision. We can use the equation:

p = m * v

where p is the momentum, m is the mass, and v is the velocity.

The momentum of the block after the collision is:

p = m * v

p = 2 kg * 4.95 m/s

p = 9.9 kg m/s

Since the total momentum of the system is conserved, the momentum of the steel ball after the collision is equal in magnitude but opposite in direction to the momentum of the block. Therefore:

p = -9.9 kg m/s

We can now use the momentum equation to find the velocity of the steel ball after the collision:

p = m * v

-9.9 kg m/s = 5 kg * v

Solving for v, we get:

v = -1.98 m/s

The negative sign indicates that the velocity of the steel ball is in the opposite direction to the velocity of the block.

Therefore, immediately after the collision, the steel ball is moving to the left with a velocity of 1.98 m/s.

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Cellular respiration is a highly efficient process that allows cells to convert the energy stored in glucose into ATP, the main energy currency of the cell. This process is essential for the survival and function of all living organisms.

The reaction involved in cellular respiration is a complex process that involves the breakdown of glucose molecules in the presence of oxygen to release energy in the form of ATP. This process is called aerobic respiration and takes place in the mitochondria of eukaryotic cells.
The first step of cellular respiration is glycolysis, which occurs in the cytoplasm of the cell. During glycolysis, glucose is broken down into two pyruvate molecules, releasing a small amount of ATP and NADH. Pyruvate is then transported into the mitochondria, where it is converted into acetyl-CoA by the enzyme pyruvate dehydrogenase.
The next step is the Krebs cycle, also known as the citric acid cycle. During this process, acetyl-CoA is broken down into carbon dioxide, producing a large amount of ATP, NADH, and FADH2.
Finally, the electrons carried by NADH and FADH2 are used to produce ATP through oxidative phosphorylation in the electron transport chain. Oxygen acts as the final electron acceptor, combining with hydrogen ions to produce water.
Overall, cellular respiration is a highly efficient process that allows cells to convert the energy stored in glucose into ATP, the main energy currency of the cell. This process is essential for the survival and function of all living organisms.

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Answer:

The motion of the object between 0 and 8 seconds, as represented by the graph above, can be broken down into four segments:

For the first 4 seconds, the object experiences an increased velocity. This means that the object is accelerating downwards due to the force of gravity. During this time, the velocity increases at a constant rate of 9.8 m/s^2.

Between 4 and 6 seconds, the object experiences a constant velocity. This means that the object continues to fall with a steady speed, without any further increase in its velocity.

Between 6 and 7 seconds, the object again experiences a constant velocity. This means that the object continues to fall with the same steady speed as before.

Finally, between 7 and 8 seconds, the object experiences a decreased velocity. This means that the object is decelerating, or slowing down, as it approaches the ground. This could be due to air resistance or other factors.

So, to summarize, the motion of the object between 0 and 8 seconds is characterized by an initial increase in velocity for 4 seconds, followed by two periods of constant velocity for 2 seconds and 1 second respectively, and finally a decrease in velocity for 1 second.

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To find the average acceleration of the snowmobile while it is slowing down, one needs to calculate the change in velocity and the time it takes to come to a stop. Therefore, the average acceleration of the snowmobile while it is slowing down is approximately -2.78 m/[tex]s^2.[/tex]

Mass of the skier (m1) = 70 kg

Mass of the snowmobile (m2) = 450 kg

Initial velocity of the snowmobile (u) = 10 m/s

Final velocity of the snowmobile (v) = 0 m/s

Distance covered by the snowmobile (s) = 18 m

the equation of motion: [tex]v^2[/tex] = [tex]u^2[/tex] + 2as

Rearranging the equation to solve for acceleration (a):

a = ( [tex]v^2[/tex]-[tex]u^2[/tex]) / (2s)

Substituting the given values: a = ([tex]0^2[/tex] - [tex]10^2[/tex]) / (2 ×18)

Simplifying: a = (-100) / 36

a = -2.78 m/[tex]s^2[/tex]

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Answer:

Matter and energy are two closely related concepts in physics. Matter is anything that has mass and takes up space, while energy is the ability to do work.

One similarity between matter and energy is that they can both be converted into each other. For example, when you burn wood, the chemical energy in the wood is converted into heat and light energy.

Another similarity between matter and energy is that they are both conserved. This means that the total amount of matter and energy in the universe never changes.

Finally, matter and energy both obey the laws of physics. This means that they can be described and predicted using the same mathematical equations.

Here are some other similarities between matter and energy:

- Both matter and energy can be stored.

- Both matter and energy can be transferred from one object to another.

- Both matter and energy can be converted into different forms.

- Both matter and energy can be used to do work.

Despite their similarities, there are also some important differences between matter and energy. One difference is that matter has mass, while energy does not. Another difference is that matter takes up space, while energy does not.

Answer: both energy and matter are conserved within a system. This means that energy and matter can change forms but cannot be created or destroyed

Explanation: lol just learned this! hope it helps :)

It would take approximately 1.33 x 10^8 seconds (or about 42 years) for a light signal from Earth to reach Proxima Centauri. For a spacecraft traveling at 0.0001c, it would also take about 42 years to reach Proxima Centauri.

To calculate the time it takes for a light signal to travel from Earth to Proxima Centauri, we can use the formula:

Time = Distance / Speed

Given:Distance to Proxima Centauri = 4.0 x 10^13 km (convert to meters by multiplying by 10^3, as 1 km = 10^3 m)

Speed of light (c) = 3 x 10^8 m/s

Converting the distance to meters:

Distance = 4.0 x 10^13 km * 10^3 = 4.0 x 10^16 m

Using the formula, we can calculate the time it takes for the light signal to travel:

Time = Distance / Speed = (4.0 x 10^16 m) / (3 x 10^8 m/s)

Time ≈ 1.33 x 10^8 seconds

To calculate the number of years it would take for a spacecraft traveling at a speed of 0.0001c to reach Proxima Centauri, we need to divide the distance by the speed of the spacecraft.

Speed of spacecraft (v) = 0.0001c = 0.0001 * 3 x 10^8 m/s = 3 x 10^4 m/s

Time = Distance / Speed = (4.0 x 10^16 m) / (3 x 10^4 m/s)Time ≈ 1.33 x 10^12 seconds

To convert seconds to years, divide the time by the number of seconds in a year:

Number of years ≈ (1.33 x 10^12 seconds) / (3.1536 x 10^7 seconds/year)

Number of years ≈ 42 years

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The Law of Demand states that price and quantity move in opposite directions.

According to the Law of Demand, there is an indirect correlation between a good or service's price and the amount of that good or service that customers are willing and able to purchase. In other words, consumers are less able and willing to purchase an item as its price rises and vice versa.

This connection between a product's price and demand for it in terms of quantity is captured by the Law of Demand. It asserts that the price of a good and the amount desired are negatively) relate

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The density of the sheet of aluminium has a mass of 200 g and a volume of 73 cm³ is 2.739 g/cm³. The mass of lead has a volume of 4cm³ and the density of lead as 11 g/cm³ is 44 g.

Density is defined as the product of mass and volume. The density is denoted by the letter ρ. The unit of density is kg/m³.

From the given,

Mass of aluminium sheet (m) = 200g

The volume of the sheet (V) = 73 cm³

The density of aluminium =?

Density = mass/volume

   ρ = 200 / 73

     = 2.739 g/cm³

Thus, the density of the aluminium sheet is 2.739 g/cm³.

Density of lead = 11 g/cm³

volume of lead = 4 cm³

mass =?

Density = mass/ volume

  mass = density × volume

           = 11×4

           = 44g

Thus, the mass of lead is 44 g.

Volume =?

mass of lead = 55g

Density = mass/ volume

volume = mass/ density

              = 55/11

              = 5 cm³

Thus, the volume of lead is 5 cm³.

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Answer: 1.8J

Explanation:

• Formula for Elastic Potential Energy: PEelastic = 1/2kx^2

• Convert cm to m: (30/100) = 0.30m

• PEelastic = (1/2)(40N/m)(.30m)^2

= 1.8J

Answer: C

In the absence of friction, the total mechanical energy of the ball is conserved throughout its motion. This conservation is known as the principle of conservation of mechanical energy. Mechanical energy is the sum of the ball's kinetic energy (KE) and potential energy (PE).

Before the ball is released, it has potential energy due to its position on the ramp, but it has no kinetic energy because it is stationary. At this point, its total mechanical energy is equal to its potential energy.

As the ball rolls downward, it gains speed and its potential energy decreases. However, this decrease in potential energy is accompanied by an increase in kinetic energy. The ball's total mechanical energy remains constant throughout the motion.

Therefore, the correct answer is:

C. The total mechanical energy is the same before it was released and at the bottom of the ramp.

Answer:

C6H12O6 is the final product of Calvin cycle light independent reactions

Explanation:

* steps in Calvin cycle

: carbon fixation

: reduction

: regeneration

for C6H12O6 it requires 2 molecules of PGAL or G3P

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To determine the magnetic force on a straight wire carrying a current in a uniform magnetic field, we can use the formula for the magnetic force:

F = I * L * B * sin(θ)

where:

F is the magnetic force,

I is the current in the wire,

L is the length of the wire,

B is the magnitude of the magnetic field, and

θ is the angle between the wire and the magnetic field.

In this case, the values are:

I = 30 A (current in the wire)

L = 2.0 m (length of the wire)

B = 55 mT = 0.055 T (magnitude of the magnetic field)

θ = 20° (angle between the wire and the magnetic field)

Substituting the values into the formula:

F = 30 A * 2.0 m * 0.055 T * sin(20°)

Calculating sin(20°):

F = 30 A * 2.0 m * 0.055 T * 0.3420

F ≈ 1.5714 N

Therefore, the magnetic force on the 2.0-meter length of wire carrying a current of 30 A in a region with a uniform magnetic field of magnitude 55 mT and at an angle of 20° away from the wire is approximately 1.5714 N.

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The maximum velocity is 48π m/s.

The equation: can be used to determine the maximum velocity of a particle in simple harmonic motion.

Vmax = ω * A

Where

The following formula can be used to get the angular frequency:

ω = 2π / T

Where

T is the motion's period.

Given that the period is π/2 seconds (T = π/2) and the amplitude is 12 m (A = 12), we can find the angular frequency:

ω = 2π / (π/2) = 4π rad/s

Now we can calculate the maximum velocity:

Vmax = ω * A = (4π rad/s) * (12 m) = 48π m/s

Therefore, the maximum velocity is 48π m/s.

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The final temperature of the mixture is 50°C.

Temperature of the hot water, T₁ = 80°C

Temperature of the cold water, T₂ = 20°C

According to the principle of calorimetry, the heat lost by the hot body is equal to the heat gained by the cold body.

So,

Heat lost by the hot water = Heat gained by the cold water

mC(T₁ - T) = mC(T - T₂)

Since, both are water and the amount of water is the same for both,

T₁ - T = T - T₂

Applying the values of T₁ and T₂,

80 - T = T - 20

2T = 100

Therefore, the final temperature of the mixture is,

T = 100/2

T = 50°C

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This is an exercise of the uniform rectilinear movement (MRU) is a type of movement in a straight line in which an object moves with constant speed. The MRU is one of the simplest movements to analyze and is used as a mathematical model to understand more complex movements.

The MRU is an important motion in physics, as it is a basic example of motion in a straight line with constant velocity. Also, many movements in real life can be approximated by the MRU.

The formula that defines the MRU is:

Where

We are told that the plane flies at a speed of 600 km/h, and we are asked how far it travels in 2 hours and 18 minutes.

Before proceeding, calculate the hours and minutes, then

t = 2 h = 120 min + 18 min = 138 min/60 h = 2.3 h

Now we have our complete data, we clear the formula for the distance and solve, then

d = v × t

d = 600 km/h × 2.3 h

d = 1380 km

The neutron number of an atom X, which undergoes alpha, and beta decay reduces the neutron number by 6.  

Alpha decay is the nuclear process in which the parent nucleus emits an alpha or helium particle to form a daughter nucleus. When a particle emits an alpha nucleus, the nucleus loses its two protons and two neutrons. Beta decay is the nuclear process in which the parent nucleus undergoes the emission of electrons to produce a daughter nucleus.

Alpha decay decreases the atomic mass number decreases by 4 and the atomic number decreases by 2. In beta decay, the neutron is converted into a proton and the atomic number decreases by one. The neutron number is affected by alpha decay.

From the given,

X atom undergoes alpha decay. X -----> ₐ₋₂Xᵇ⁻⁴ + He₂⁴. The neutron number decreases by two.  ₐ₋₂Xᵇ⁻⁴ ----->    ₐ₋₂₋₂Xᵇ⁻⁴⁻⁴ + He₂⁴. The neutron number decreases by two.

When the X atom undergoes beta decay, ₐ₋₄Xᵇ⁻⁸---> ₐ₋₅Xᵇ⁻⁸ + ₋₁e⁰. The neutron number does not get affected. When the atom again undergoes alpha decay,  ₐ₋₅Xᵇ⁻⁸ ----->  ₐ₋₇Xᵇ⁻¹². Thus, the neutron number decreases by 6 when the atom undergoes three alpha decay.

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The velocity of the wave with a frequency of 3500 Hz is 52500 m/s.

Velocity is the rate of change of displacement. The S.I unit of Velocity is m/s. Velocity is a vector quantity because it can be measured both in magnitude and direction.

To calculate the velocity of the wave, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

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The color red has less energy than the color orange because it has a lower frequency.

Color and frequency are related to each other and can be used infer energy level.

E = hf

where;

Red light has a longer wavelength and lower frequency than orange light, meaning that it has less energy.

Orange light has a shorter wavelength and higher frequency than red light, meaning that it has more energy.

Therefore, the color of light is directly related to its energy content, with shorter wavelengths corresponding to higher energies.

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O The color red has less energy than the color orange because it has a lower frequency.

Shorter waves vibrate at higher frequencies and have higher energies. The color red has relatively long wavelengths. Thus, low frequencies.  The frequency and energy decrease as the sky turns red. If the sky was, for example, blue then the answer would be:

The color blue has more energy than the color red because it has a higher frequency.

Or

The color orange has more energy than the color red because it has a higher frequency.

Hope this helps!

Weight is best defined as C) the force of gravity on an object.