Answer:
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Explanation:
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<h2>Thanks</h2>
Answer:
See explanations below
Explanation:
According to Newtons second law of motion
F = mass * acceleration
F = ma
If mass of an object is decreased to half, then m₂ = 1/2 m
If acting force is reduced by quarter, then F₂ = 3/4 F
F₂ = m₂a₂
3/4F = 1/2m a₂
Divide both expressions
(3/4F)/F = (1/2m)a₂/ma
3/4 = 1/2a₂/a
3/4 = a₂/2a
4a₂ = 6a
2a₂ = 3a
a₂ = 3/2 a
Hence the acceleration of its motion will be one and a half of its original acceleration.
The answer is D. As the ambulance gets closer, the sound waves are compressed relative to the person; so the frequency increases.
The force of a charge in an electric field is:
In this case we know the electric field is:
and that the charge is that of the electron, then we have:
Therefore, the magnitude of the force is
and in points down.
The weight of the electron is:
Making the quotient between the force we have:
Therefore, the electric force is approximately 1e9 times the weight.
