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3 years ago

Sand dunes during the Dust Bowl are an example of:

Physics

1 answer:

choli [55]3 years ago

5 0

Sand dunes during the Dust Bowl are an example of windward.

The sand dunes are formed due to high movement of wind in the deserts which make dunes in the direction where wind is moving. Windward refers to facing the wind or situated on the side facing the wind so in those regions where the wind moves bring sand with itself and make dunes in that area so we can conclude that sand dunes are formed in the windward regions.

Learn more: brainly.com/question/24879138

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An object rolls East at a steady speed of 12 m/s for 3 seconds. What distance did the object travel

horrorfan [7]

Answer: 36 meters.

Equation to find distance:
Speed x time

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3 years ago

If the 50-kg crate starts from rest and achieves a velocity of v = 4 m/s

Kay [80]

Answer:

P = 227 N

Explanation:

Assuming the crate is on horizontal ground and subject to a horizontal force.

F = ma

P - μmg = ma

P = m(a + μg)

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3 years ago

What is the force of impact of a 100 kg diver who falls into a swimming pool and hits the surface of the water and comes to a st

Simora [160]

Answer:

F = 53153.36[N]

Explanation:

In order to solve this problem, we must first use the principle of conservation of energy which is transformed from potential energy to kinetic, in this way we can determine the velocity at which the person enters the water.

$E_{pot}=E_{kin}\\m*g*h=\frac{1}{2}*m*v^{2}$

where:

m = mass = 100 [kg]

g = gravity acceleration = 9.81 [m/s²]

h = elevation = 9 [m]

v = velocity [m/s]

Now replacing we can determinate the velocity.

$v^{2}=2*g*h\\v=\sqrt{2*g*h}\\v=\sqrt{2*9.81*9}\\v = 13.28[m/s]$

Then we can calculate the momentum which can be calculated as the product of force by time, this momentum is also equal to the product of mass by velocity.

$P=m*v\\and\\P =F*t\\F*t=m*v$

Now replacing:

F = impact force [N]

t = time = 0.025 [s]

m = 100 [kg]

v = velocity = 13.28 [m/s]

$F*0.025=100*13.28\\F=53153.36[N]$

8 0

3 years ago

According to the Doppler Effect, which statement is true about a sound as it approaches you and then moves away.

sukhopar [10]

Answer:

A) As the source approaches you, the waves are compressed so that the pitch of the noise increases.

Explanation:

The Doppler Effect occurs when there is relative motion between an observer and the source of a wave. When this happens, there is an apparent shift in the frequency of the wave, as perceived by the observer. In particular, two situations can occur:

1- If the source of the wave is moving towards the observer, the waves are compressed, so that the wavelength of the wave decreases, and therefore the frequency (and so the pitch) increases

2- If the source of the wave is moving away from the observer, the waves are stretched, so that the wavelength of the wave increases, and therefore the frequency (and so the pitch) decreases

An example of Doppler Effect occurs when we hear the sound of the siren of an ambulance.

In this problem, the situation described is situation 1 (sound waves is approaching the observer), so according to the explanation above, the correct answer is

A) As the source approaches you, the waves are compressed so that the pitch of the noise increases.

3 0

3 years ago

Read 2 more answers