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sweet [91]
3 years ago
10

Two car horns are sounded creating two sound waves with frequencies that differ by a factor of three. How does the speed of the

higher frequency sound wave compare to the lower frequency sound wave?
Physics
1 answer:
Andrews [41]3 years ago
7 0

Answer:

Remains the same

Explanation:

The speed of waves of higher and lower frequency both will be same.

the speed of sound in a medium is constant  and independent of it's frequency. Moreover, when the frequency changes wavelength changes accordingly, such that their product remains constant.

we know that

υ×λ = constant = velocity

υ= frequency

λ= wavelength.

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When it reacts with another element, an oxygen atom gains two electrons.
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A

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Answer:

Explanation:

Given

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6 0
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:

Explanation:

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E_1=\frac{GM_em}{R_e}-\frac{GM_em}{R_e+h}

Now Energy required to orbit around the earth

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\Delta E=E_1-E_2

\Delta E=\frac{GM_em}{R_e}-\frac{GM_em}{R_e+h}-\frac{GM_2m}{2(R_e+h)}

E_1=E_2  (given)

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

\frac{1}{R_e}-\frac{3}{2(R_e+h)}=0

h=\frac{R_e}{2}

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(b)For greater height E_1  is greater than E_2

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4 0
3 years ago
Which of the following changes would make a heat engine waste more energy as heat
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A decrease in it's operating temperature would make a heat engine less efficient. This is because in order to operate, a heat engine needs to be hot and maintain that temperature.
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