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Luden [163]
3 years ago
6

5. For what purpose do bats use ultrasonic waves?

Physics
1 answer:
Hunter-Best [27]3 years ago
4 0

Answer:

Doppler effect

Explanation:

because it uses that to catch it's prey

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2. You decide to lift a 25 kg box to a height of 3 meters. How much work will you do while moving
nadya68 [22]

Answer:

W = 735.75[J]

Explanation:

Work is defined as the product of force by distance. Therefore we can use the following equation.

W=F*d

where:

W = work [J] (units of Joules)

F = force [N] (units of Newtons)

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But first, we must determine the force that is equal to the product of mass by gravity (weight of the body).

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W=F*d\\W=245.25*3\\W=735.75[J]

4 0
3 years ago
A wave is moving at the rate of 40 cm/s. Its wavelength is 5 cm. What is the frequency of the wave? INCLUDE THE CORRECT UNIT!
miskamm [114]

Answer:

Solution given:

velocity=40cm/s

wave length=5cm

we have

frequency =velocity/wavelength=40/5=8hertz.

the frequency of the <u>wave</u><u> </u><u>i</u><u>s</u><u> </u><u>8</u><u> </u><u>h</u><u>e</u><u>r</u><u>t</u><u>z</u><u>.</u>

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What type of device is a car engine?
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heat engine that uses work to move heat

mark brainliest  :)

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