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3 years ago

What is an apparent change in the frequency of sound or light waves known as?

Physics

2 answers:

BartSMP [9]3 years ago

4 0

The apparent change is the Doppler shift

choli [55]3 years ago

3 0

It is called Doppler effect (i.e, apparent change in the frequency of a sound , when the source, the observer and the medium are in the relative motion is called Doppler effect)

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HELP ANSWER QUESTION 1

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The width is 2.5 cm long and could not be the right answer

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2 years ago

You attach a meter stick to an oak tree, such that the top of the meter stick is 1.87 meters above the ground. Later, an acorn f

Alborosie

Answer:

3.25 m

Explanation:

t = Time taken = 0.166 seconds

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration = 9.81 m/s²

s = 1 because meter stick is 1 meter in length

$s=ut+\frac{1}{2}at^2\\\Rightarrow u=\frac{s-\frac{1}{2}at^2}{t}\\\Rightarrow u=\frac{1-\frac{1}{2}\times 9.81\times 0.166^2}{0.166}\\\Rightarrow u=5.21\ m/s$

Here, the initial velocity of point B is calculated from the time which is given. This velocity will be the final velocity of the acorn which falling from point A.

$v^2-u^2=2as\\\Rightarrow s=\frac{v^2-u^2}{2a}\\\Rightarrow s=\frac{5.21^2-0^2}{2\times 9.81}\\\Rightarrow s=1.38\ m$

The distance of the acorn from the ground is 1.87+1.38 = 3.25 m

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2 years ago

Can you help me with these physics questions

Andre45 [30]

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3 years ago

How is it possible that only 92 elements are found in the natural world but there are millions of different types of molecules?

Katena32 [7]

Answer:

92 elemns in mendeleef oisv

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2 years ago

Rock layer that must be rich in organic matter that was subjected to heat and pressure over time during the formation of oil and

Reika [66]

The lowest rock layer is a layer that must be rich in organic matter that was subjected to heat and pressure over time during the formation of oil and gas.

<h3>What is the lowest rock layer?</h3>

The lowest rock layer refers to the lowermost part of the Earth's mantle, which is a thin rock layer (approximately 250 km).

In the Earth, the layers of rocks are progressively deposited, thereby pressing them to the bottom to generate sedimentary rocks.

The lowest rock layers on the bottom must be rich in organic matter to form fossil fuels.

Learn more about rock layers here:

brainly.com/question/25846908

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1 year ago