What measurements would you need to calculate the density of a nail? a) the length of the nail. b) the color of the nail. c) the mass of the nail. d) the material the nail is made from.

Explanation:

So, to find the density of an object, all you got to do is measure its mass, then its volume, and then divide the Mass by Volume.

Those are the only two variables that we measure which gets us the value of the object's density.

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GL.

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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pe = weightxheight = 2000x1000=2,000,000joules