If you were trying to build a sound proof room, which of the following materials would you choose in order to absorb the most sound, based on the coefficient of absorption for each material

Answer:

The answer is Crest just learned it in science.

Explanation:

Final answer:

In a transverse wave, the particles of the medium move perpendicularly to the direction of the wave. The highest point of such a wave is referred to as the crest.

Explanation:

In a transverse wave, particles of the medium move in a direction perpendicular to the direction of the wave. The highest point of a transverse wave is called the crest. It's opposite, the lowest point, is called the trough. For example, if we were to observe a wave in the ocean, the crest would be the highest point the water reaches and the trough would be the lowest point.

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Answer:

3 A

Explanation:

The relationship between voltage, current and resistance in a conductor is expressed by Ohm's law, which states that:

where:

V is the potential difference across the conductor

R is the resistance of the conductor

I is the current flowing through it

In this problem, for this flashlight we have:

V = 90 V is the potential difference

is the resistance of the flashlight

Solving for I, we find the current:

The weight of an object is the force it experience by the gravitational pull of the planet. The gravitational pull by earth is greater than that from moon. This leads to greater weight in earth than in moon.

What is gravitational force ?

Gravitational force is a kind of force by which an object attracts other objects into its center of mass. The force exerted between the objects depends on the mass and distance between them.

Earth exerts a gravitational pull to every objects on its surface and that's why we are standing on the ground. We experience a weight downwards due to this force.

The acceleration due to gravity  in earth = 9.8 m/s²

g in moon = 1.63m/s².

then weight = m g

the weight of a 10 kg iron bar in earth is 98 N and that in moon will be 16.3 N.

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Answer:

The decrease in the downward force that a mass of iron can exert on the moon versus the force it exerts on earth is due to:

• The force of gravity on Earth is greater than the force of gravity on the moon.

Explanation:

To recognize the calculation within the statement, you must know that the Newton unit is equal to:

• Newton = (Kilogram * meter) / second ^ 2

And that the gravities of the Earth and the Moon are:

• Earth gravity = 9.807 m / s ^ 2
• Moon gravity = 1.63 m / s ^ 2

Finally, you must know the force formula (since we are talking about a descending force):

• Force = mass * acceleration (gravity is a measure of acceleration)

Since the mass in both cases is the same (10 kilograms), the variation in acceleration will provide different values of descending force, as shown below, replacing the values:

1. Downward force on Earth = 10 Kg * 9,807 m / s ^ 2 = 98.07 Kg * m / s ^ 2 = 98.07 Newtons.
2. Downward force on the Moon = 10 Kg * 1.63 m / s ^ 2 = 16.3 Kg * m / s ^ 2 = 16.3 Newtons.

As you can see, when it comes to force, the less acceleration (in this case less gravity), the lower the downward force will be with a mass of equal weight.