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<span>I don't think there is enough information from the question. If you are asked to calculate the number of microbes in a certain area., then it should be that the total area or maybe the volume of that should be given so you can estimate the number of microbes. Hope this helps.</span>
Answer:
Explanation:
<u>Impulse and Momentum</u>
The impulse-momentum theorem states that the change in momentum of an object equals the impulse applied to it.
The equation can be written as follows:
Where:
J = Impulse
p2 = Final Momentum
p2 = Initial Momentum
The momentum can be calculated as:
p = m.v
Where m is the mass of the object and v is the velocity.
The tennis ball with mass m=60 g = 0.06 Kg was served from rest (v1=0) to v2=50 m/s. The change in momentum is:
Thus the impulse is:
The force decreases by a factor of 4, because 4 is 2-squared. (C).
And they don't have to be "large" masses. The force behaves exactly the same between the lint in your pocket and a speck of dust on a table in the house across the street.