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3 years ago

15

The speed of the wave depends on what?

1 answer:

kolbaska11 [484]3 years ago

4 0

The speed of a mechanical wave depends on the mechanical properties
of the medium through which the wave is traveling.

The speed of an electromagnetic wave depends on the electrical properties
of the medium through which the wave is traveling.

It's pretty well unanimous for choice <em>A</em> .

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3 years ago

(a) At what height above Earth’s surface is the energy required to lift a satellite to that height equal to the kinetic energy r

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Answer:

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Gravitational Potential Energy at earth surface $U_1=\frac{GM_em}{R_e}$

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Now Energy required to orbit around the earth

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$\frac{GM_em}{R_e}-\frac{GM_em}{R_e+h}-\frac{GM_2m}{2(R_e+h)}=0$

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3 years ago

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