3 years ago

Which has more PE an elephant 2 meters in the air or an elephant 10 meters in the air? Explain.

1 answer:

6 0

The higher up an object is the greater its gravitational potential energy so an elephant 10 meters in the air would have greater potential energy than and elephant 2 meters in the air.

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What is the english system of measurement called?

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The answer is imperial units

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3 years ago

Would it be correct to say the Doppler Effect is the apparent change in the speed of a wave due to the motion of the source?

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Yes that would be correct. But if its an essay I'd be a bit more elaborate and give examples.

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A 2000 Hz siren and a civil defense official are both at rest with respect to the ground. What frequency does the official hear

astra-53 [7]

Answer:

a) $f_1 = 2070.6 Hz$

b) $f_2 = 1929.4 Hz$

Explanation:

Apparent frequency of the siren is given as

$f = \frac{v_{rel}}{\lambda}$

as we know that the wavelength will remain the same as it is having originally

sowe know

$\lambda = \frac{340}{2000}$

$\lambda = 0.17 m$

a) Now when wind is blowing from source to official

so we have

$v_{rel} = 340 + 12 = 352 m/s$

so we have

$f_1 = \frac{352}{0.17}$

$f_1 = 2070.6 Hz$

b) Now when wind is from official to source

so we have

$v_{rel} = 340 - 12 = 328 m/s$

so we have

$f_2 = \frac{328}{0.17}$

$f_2 = 1929.4 Hz$

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4 years ago

The steps below describe how you hear. number the steps in the correct order. the first one is done for you

NNADVOKAT [17]

Hope this helps! : )

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3 years ago

Ohm’s law is I = V ÷ R. What is the current of a circuit with a 3.0-volt battery and 1.0 ohm of resistance? The current of a cir

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Current = voltage \ resistance
x= 3 \ 1
x = 3 amps

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3 years ago

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