I just need an answer to question 3. Please explain how to solve it.

Answer:

speed of light is decreasing, creating the rainbow effect

Explanation:

the prism is acting as a vaccum, when light enters a vaccum it's refracted

Answer:

5

Explanation:

10/2 = 5

Answer:

Coal was one of man's earliest sources of heat and light. The Chinese were known to have used it more than 3,000 years ago. The first recorded discovery of coal in this country was by French explorers on the Illinois River in 1679, and the earliest recorded commercial mining occurred near Richmond, Virginia, in 1748

Explanation:

The most effective insulating material is polystyrene.

The material which isolates the body and doesn't allow heat and mass to flow out of the control system.

The insulating material should have the lowest thermal conductivity.

Polystyrene foam has low thermal conductivity which makes it a great insulator to heat.

Aluminum foil can be an effective insulating material because it doesn't flow heat out into the environment.

Cotton wool is effective, but not it is not fire resistant.

Thus, the best effective insulating material is polystyrene.

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Answer:

yes it is

Explanation:

(1) The time does pilot take the weight to hit the ground = 2.4 s

(2) The pilot travel before land = 400 m

Because fall time is proportional to fall height and acceleration due to gravity (g) is constant,

t₁ = t₂  

s₁ = initial distance

s₂ = final distance

t₁ = initial time

t₂ = final time

Hence, the time does it take the weight to hit the ground = 2.4 s

The initial distance (s₁) = 200 m, and the pilot does a run at the same height but twice the speed.

So, the  pilot travel before land:

s₂ = 2 x s₁

= 2 x 200 m

= 400 m

The question is incomplete, it should be:

There are competitions in which pilots fly small planes low over the ground and drop weights, trying to hit a target. A pilot flying low and slow drops a weight; it takes 2.4 s to hit the ground, during which it travels a horizontal distance of 200 m. Now the pilot does a run at the same height but twice the speed. How much time does it take the weight to hit the ground? How far does it travel before it lands?

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Explanation:

it holds protons and neutrons together

Strong nuclear force holds protons and neutrons together.

Proton is a subatomic particle with a positive electric charge.

Neutrons is a subatomic particle of about the same mass as a proton but without an electric charge.

The nuclear force is a force that acts between the protons and neutrons of atoms.

The strong nuclear force is created between nucleons by the exchange of particles called mesons. It is stronger than the force of gravity as it binds the fundamental particles to form large particle.

Strong nuclear force is strongest force in nature. So, it is much stronger than gravitational forces. It binds the neutral charges i.e. neutron instead of repelling them. It is a short range force so it can not act over very large distances.

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Answer:

Warm ocean currents originate near the equator and move towards the poles or higher latitudes while cold currents originate near the poles or higher latitudes and move towards the tropics or lower latitudes.

Explanation:

Warm ocean currents originate near the equator and move towards the poles or higher latitudes while cold currents originate near the poles or higher latitudes and move towards the tropics or lower latitudes. The current's direction and speed depend on the shoreline and the ocean floor

Answer:

a = 0.45 m/s²

Explanation:

The given question is ''Calculate the acceleration that produces a force of 40 N on a body with 88 kg of mass".

Given that,

Force, F = 40 N

Mass of the body, m = 88 kg

The net force acting on the body is given by :

F = ma

Where

a is the acceleration of the body

\(a=\dfrac{F}{m}\\\\a=\dfrac{40\ N}{88\ kg}\\\\a=0.45\ m/s^2\)

So, the required acceleration is 0.45 m/s².

The trombonist is producing a sound wave with a frequency of 262 Hz.

The first thing we need to do is to find the frequency of the sound wave that is reaching you from your neighbor's trumpet. We can use the formula:

f = v / λ

where f is the frequency of the sound wave, v is the speed of sound in air, and λ is the wavelength of the sound wave. Since you are moving away from the trumpet, the frequency of the sound wave that you hear is lower than the frequency that the trumpeter is producing. This is because the sound waves are getting stretched out as they travel through the air, similar to the way that a spring would stretch out if you pulled on it.

To calculate the wavelength of the sound wave, we can use the formula:

λ = v / f

where λ is the wavelength, v is the speed of sound in air, and f is the frequency of the sound wave. We know that the frequency of the sound wave from the trumpet is 262 Hz, so we can plug that into the formula to get:

λ = 339 m/s / 262 Hz
λ = 1.29 m

Now that we know the wavelength of the sound wave from the trumpet, we can use that to find the frequency of the sound wave from the trombone. The two sound waves are in phase, which means that they are at the same point in their cycles at the same time. This is why they sound like they are at the same pitch. To be in phase, the sound waves must have the same wavelength. Since we know the wavelength of the sound wave from the trumpet, we can set that equal to the wavelength of the sound wave from the trombone:

λ trumpet = λ trombone

Using the formula for wavelength, we can rearrange this to:

f trumpet / v = f trombone / v

which simplifies to:

f trumpet = f trombone

This means that the frequency of the sound wave from the trombone is also 262 Hz. We can confirm this by using the formula for frequency with the wavelength that we found for the trumpet:

f = v / λ
f = 339 m/s / 1.29 m
f = 262 Hz

The trombonist is producing a sound wave with a frequency of 262 Hz.

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The force that pushes groundwater from pore space to pore space when below the water table is primarily due to the pressure gradient within the aquifer. This pressure gradient is caused by the weight of the overlying water and the force of gravity.

Below the water table, the spaces between soil or rock particles are filled with water. These spaces are known as pore spaces. The water table represents the upper surface of the saturated zone, where all the pore spaces are filled with water. gravity acts vertically downward, causing the weight of the water above a particular point to exert a downward force. As a result, the water pressure increases with depth. This increase in pressure creates a pressure gradient within the aquifer.

The pressure gradient drives the flow of groundwater from areas of higher pressure to areas of lower pressure. When a well is drilled into the aquifer below the water table, water will naturally flow into the well and rise to the level of the water table. This is because the pressure is higher below the water table compared to the lower pressure in the well.

The movement of groundwater from pore space to pore space occurs due to the pressure difference between adjacent spaces. Water will flow from areas of higher pressure to areas of lower pressure until the pressures equalize. This movement of water is known as groundwater flow or hydraulic conductivity.

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Answer:  true

Explanation:

Answer:

the answer is true answer true

When a certain shade of blue has a frequency of 7.33×10¹⁴ Hz. So, the energy will be 4.86×10⁻¹⁹ J,

To calculate the energy of one photon of a certain shade of blue light with a frequency of 7.33×10¹⁴ Hz, we can use the formula: E = hf, where E is the energy of one photon, h is Planck's constant, and f is the frequency of the light.

Using Planck's constant ℎ=6.626×10⁻³⁴ J⋅s, we can calculate the energy of one photon of the blue light as follows:

E = hf = (6.626×10⁻³⁴ J⋅s)(7.33×10¹⁴ Hz) = 4.86×10⁻¹⁹ J

Therefore, the energy of exactly one photon of this light is 4.86×10⁻¹⁹ J.

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The heat lost by water is equal to the heat gained by ice here. The heat lost from water for a temperature change of 25 to 10 degree Celsius is 12300 J.

Calorimetry is an analytical technique used to determine the heat energy absorbed or evolved by a system. The calorimetric equation relating the heat energy q with the mass m, specific heat c and the temperature difference ΔT is :

q = m c ΔT

Here, the heat energy gained by the dry ice is equal to the heat lost from water.

temperature difference for water = 25- 10 °C = 15°C

thus, 15°C is lost from water.

mass of water = 200 g

q =200 g × 4.12 J/°C g × 10°C = 12300 J

Therefore, the heat energy lost from water is 12300 J.

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An individual's capacity to notice and learn about a stimulus is diminished if they have previously been exposed to it in a neutral or irrelevant environment. This phenomenon is known as latent inhibition.

With the use of traditional training procedures, latent inhibition is frequently examined. In a typical experiment, an individual or an animal is repeatedly exposed to an unimportant stimulus with no noticeable results. In following trials, the neutral stimulus is coupled with a physiologically important stimulus (such as food or an electric shock).

The goal is to determine how the subject's capacity to build an association between the neutral stimulus and the important stimulus is affected by the subject's prior exposure to the neutral stimulus. According to the phenomena of latent inhibition, prior exposure to a stimulus without any discernible effects results in a reduction in attention or learning when the stimulus is subsequently encountered in a pertinent context.

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Answer:

If we compare 270 J and 2 380.5 J the higher is 2 380.5 J which is A 9 kg object traveling at 23 m/s

Explanation:

A 60 kg object traveling at 3 m/s

Given:

m = 60 kg

v = 3 m/s

Unknown:

KE or kinetic energy

Formula and solution:

KE = 1/2 mv²

KE = 1/2 (60kg) (3m/s)²

KE = (30kg) (9m²/s²)

Final Answer:

KE = 270 kg·m²/s² or simplify as 270 J

A 9 kg object traveling at 23 m/s

Given:

m = 9kg

v = 23m/s

Unknown:

KE or kinetic energy

Formula and solution:

KE = 1/2 mv²

KE = 1/2 (9kg) (23m/s)²

KE = (4.5kg) (529m²/s²)

Final Answer:

KE = 2 380.5 kg·m²/s² or simplify as 2 380.5 J

The situation in which there will be an increase in kinetic energy is C. A fan is switched from "low speed" to "high speed."

Kinetic energy is the energy of motion. When an object's speed increases, its kinetic energy also increases. In the case of the fan, switching from "low speed" to "high speed" will increase the speed of the fan blades, and therefore increase the kinetic energy of the fan.

In the other options, there is no increase in kinetic energy. A kicked football approaching its maximum height is actually losing kinetic energy as it slows down due to gravity. A filing cabinet pushed across a rough floor at constant speed has a constant amount of kinetic energy, as does a train pulled up a mountain at a constant speed. And the planet Venus moving in its nearly circular orbit around the Sun also has a constant amount of kinetic energy, as its speed does not change.

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Answer:

b

Explanation:

voltage across 2.0μf capacitor is 5.32v

Given:

C1=2.0μf

C2=4.0μf

since two capacitors are in series there equivalent capacitance will be

[tex] \frac{1}{c} = \frac{1}{c1} + \frac{1}{c2} \)

\(c = \frac{c1 \times c2}{c1 + c2} \)

\( = \frac{2 \times 4}{2 + 4} \)

=1.33μf

As the capacitance of a capacitor is equal to the ratio of the stored charge to the potential difference across its plates, giving: C = Q/V, thus V = Q/C as Q is constant across all series connected capacitors, therefore the individual voltage drops across each capacitor is determined by its its capacitance value.

Q=CV

given,V=8v

\( = 1.33 \times 10 {}^{ - 6} \times 8\)

\( = 10.64 \times 10 {}^{ - 6} \)

charge on 2.0μf capacitor is

\( \frac{Qeq}{2 \times 10 {}^{ - 6} } \)

\( = \frac{10.64 \times 10 {}^{ - 6} }{2 \times 10 {}^{ - 6} } \)

=5.32v

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The statement "Relative to the size of the planet, Mercury has the largest core of any planet in the solar system" is TRUE.

Relative to its size, Mercury has the largest core of any planet in the solar system. Mercury is the smallest planet in our solar system, but it has a relatively large core compared to its overall size. The core of Mercury is composed mostly of iron and is believed to make up about 85% of the planet's radius. This large core is thought to be a result of early differentiation during the planet's formation, where the denser materials sank to the center, leaving a relatively thin mantle and crust.

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The following measurement means "no limitation". This measurement indicates the range of motion for wrist flexion, which is the movement of the wrist towards the palm of the hand.

What is wrist flexion?

Wrist flexion is the movement of the wrist towards the palm of the hand. It is the opposite movement of wrist extension, which is the movement of the wrist away from the palm of the hand. Wrist flexion is an important motion for many daily activities such as typing, writing, and holding objects.

What does 15-85 degrees of wrist flexion mean?

When measuring wrist flexion, the range of motion is measured in degrees. In this case, the measurement is 15-85 degrees. This means that the normal range of motion for wrist flexion is between 15 and 85 degrees. If the measurement falls within this range, then there is no limitation in wrist flexion. However, if the measurement falls outside of this range, then there may be a limitation in wrist flexion.A limitation in extension refers to a decreased range of motion when moving the wrist away from the palm of the hand. A limitation in flexion refers to a decreased range of motion when moving the wrist towards the palm of the hand. A limitation in both flexion and extension refers to a decreased range of motion in both movements.

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Answer:

10s [seconds]

Explanation:

\(t = \frac{v}{a} \)

Answer:

Centrifugal Force = 45.65N

Explanation:

Given the following data;

Mass, m = 80kg

Radius = 487m

Velocity = 60km/h to m/s = 60*1000/3600 = 16.67m/s

To find the centrifugal force;

Centrifugal Force = mv²/r

Substituting into the equation, we have;

Centrifugal Force = 80*16.67²/487

Centrifugal Force = 80*277.89/487

Centrifugal Force = 2223.12/487

Centrifugal Force = 45.65N

Answer:

A. Increase the distance between the objects.

D. Decrease the mass of one of the objects.

Explanation:

The smaller the mass of an object the less gravity it has and the farther away two objects are the less gravitational force

As there is no figure provided, I cannot provide a specific answer to this question. However, I can explain the concept of equilibrium and the conditions necessary for an object to be in equilibrium.

When an object is in equilibrium, it means that it is not accelerating and its net force is zero. There are two types of equilibrium: static equilibrium and dynamic equilibrium.

Static equilibrium is when the object is at rest and its net force is zero. Dynamic equilibrium is when the object is moving at a constant velocity and its net force is zero.

For an object to be in static equilibrium, two conditions must be met:

The net force acting on the object must be zero.

The net torque (rotational force) acting on the object must be zero.

In order to determine the magnitudes of the forces F_u1 and F_u2, we would need more information about the object and the forces acting on it.

We would need to know the direction and magnitude of all the forces acting on the object, as well as the distance between the forces and the point of rotation (if there is any).

Without this information, it is not possible to determine the magnitudes of F_u1 and F_u2.

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Answer:   Eat only when you're truly hungry instead of when you are tired, anxious, or feeling an emotion besides hunger.

Plan meals ahead of time to ensure that you eat a healthy well-balanced meal.

Keep more fruits, low-fat dairy products (low-fat milk and low-fat yogurt), vegetables, and whole-grain foods at home and at work.

Explanation:

Answer:

I know that some foods have a lot of sugar. I read online that I don’t need any more than 25 grams of added sugar a day. One kind of pop that I like to drink has 40 grams of sugar per can. I can start by drinking less pop. Next, I learned that some food makers are now putting nutrition keys on the front of their boxes. I love all kinds of breakfast cereal, so I can use the nutrition key to compare brands. Cereal high in fiber is good, but cereal high in sugar isn’t. I’ll be more careful, too, when ordering fast food. Sometimes fast-food places want to change the size of my order from medium to large for a higher price. From now on, I won’t pick the bigger meal. Picking the medium-sized meal should be better for me and can even save me money.

Explanation: Plato

Answer: Heyo Kenji Here! Here's your answer- As expressed by the equation, potential energy depends upon the mass and the height of the object. Any increase in these two quantities will lead to an increase in the amount of potential energy possessed by the object.

Explanation: Hope this helps!

Have a nice day!

- Kenji ^^

Answer:

4 m/s East.

Explanation:

Velocity: This cam be defined as the rate of change of displacement. The unit of velocity is m/s.

From the question,

v = d/t...................... Equation 1

Where v = velocity, d = displacement, t = time.

Given: d = 20 m East, t = 5 seconds.

substitute into equation 1

v = 20/5

v = 4 m/s East.

Hence the average velocity = 4 m/s East.