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3 years ago

Assume a change at the source of sound reduces the wavelength of a sound wave in air by a factor of 3.

Physics

1 answer:

noname [10]3 years ago

8 0

Explanation:

The speed of a wave is given by :

$v=f\lambda$ ......(1)

(i) Here, the wavelength of a sound wave in air reduces by a factor of 3. Equation (1) becomes :

$\lambda=\dfrac{v}{f}$

Wavelength and frequency are inversely proportional to each other. So, if wavelength of a sound wave in air reduces by a factor of 3, then the frequency will increases by a factor of 3.

(ii) It remains the same.

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2 years ago

A spy satellite uses a telescope with a 1.7-m-diameter mirror. It orbits the earth at a height of 180 km.

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Explanation:

Given that;

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2 years ago

7. A block of copper of unknown mass has an initial temperature of 65.4oC. The copper is immersed in a beaker containing 95.7g o

dolphi86 [110]

Answer:

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Explanation:

m = Mass

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1 denotes water

2 denotes copper

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In this case the heat transfer will be equal

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