Someone please quickly help me with this problem?

Physics

2 answers:

Crazy boy [7]3 years ago

5 0

The answer is 60 km. I hope it helps i dont know if this is right or wrong.

Thepotemich [5.8K]3 years ago

4 0

The answer should be 56 I believe you just do 70x4 then divide by the hours tins took

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If 10. joules of work must be done to move 2.0 coulombs of charge from point A to point B in an electric field, the potential di

masya89 [10]

The equation for work (W) done by an electric field is:

W = qΔV

where q is the magnitude of the charge and ΔV is the potential difference. The question gives you W and q, so plug n' play to find ΔV:

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3 years ago

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oksian1 [2.3K]

Answer:

A. The wavelengths of the new sound waves are longer

Explanation:

This is the Doppler effect which can be best illustraded for the case of a siren of an ambulance approaching us having a greater frequency and getting lower in frequency and deeper as the ambulance passes us.

Since the wavelength is inversely proportional to the frequency it follows the wavelengths are longer when the frequency decreases lowering its pitch and getting deeper.

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kolezko [41]

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This is in reference to Newton’s second law of motion.

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3 years ago

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A thin spherical glass shell in air is filled with an unknown liquid. A horizontal parallel light beam is incident on the shell

sammy [17]

I have the exact same question, any chance you figured it out since you posted this?

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3 years ago

A high-jumper, having just cleared the bar, lands on an air mattress and comes to rest. Had she landed directly on the hard grou

Hoochie [10]

Answer:

e. the air mattress exerts the same impulse, but a smaller net avg force, on the high-jumper than hard-ground.

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This is according to the Newton's second law and energy conservation that the force exerted by the hard-ground is more than the force exerted by the mattress.

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Mathematical expression for the Newton's second law of motion is given as:

$F=\frac{dp}{dt}$ ............................................(1)