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MaRussiya [10]
2 years ago
12

The ozone layer protects us from the harmful effects of which type of radiation?

Physics
1 answer:
leonid [27]2 years ago
3 0

Answer:

Hey there

The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation

Can u have brainly

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Explanation:

Speed of sound increases with density of the medium.  Since wood is less dense than water, the speed of sound is lower in wood.

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Which of the following stars is likely to emit the most energy into space?
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Consider a taut inextensible string. You shake the end of the string with some frequency, causing a wave to travel down the stri
masha68 [24]

Answer:

Part 1:

Option B is correct (It will remain unchanged).

Part 2:

Option C is correct (It will increase by a factor of √ 2)

Part 3:

Option E is correct (It will be half as fast/long.)

Part 4:

Option C is correct (It will increase by a factor of √ 2.)

Explanation:

Formula we are going to use:

V=f*λ

Where:

V is the speed of Sound

f is the frequency of wave

λ is the wavelength.

The speed of wave , tension and linear density have following relation:

V=\sqrt{F/\rho}

Where:

V is the speed of Sound (Initial)

F is the tension in string (Initial)

\rho is the linear density of string (Constant)

Terms:

V' is the new speed

f' is the new frequency

λ' is the wavelength

Solution:

Part 1:

From V=\sqrt{F/\rho}:

Speed of Sound is independent of the frequency of shaking so speed well remain unchanged.

Option B is correct (It will remain unchanged)

Part 2:

If F'=2F then

V=\sqrt{F/\rho}

V'=\sqrt{F'/\rho}\\V'=\sqrt{2F/\rho}\\V'=  \sqrt{2} * \sqrt{F/\rho}\\V'=\sqrt{2}V

Option C is correct (It will increase by a factor of √ 2)

Part 3:

Formula we are going to use:

V=f*λ

Given f'=2f,

Even though frequency is doubled we will keep velocities same. V=V' in order to find the changing wavelength.

V'=f'*λ'

f*λ=f'*λ'

f*λ=2f*λ'

Solving above Equation:

λ'=λ/2

Option E is correct (It will be half as fast/long.)

Part 4:

T'=2T means V'=\sqrt{2}V (From Part 1)

f'=f

Now:

V'=f'*λ'

\sqrt{2}f*\lambda=f'*\lambda '\\\sqrt{2}f*\lambda=f*\lambda '\\ \lambda '=\sqrt{2}*\lambda

Option C is correct (It will increase by a factor of √ 2.)

5 0
2 years ago
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