The mimentum of a 10 kg object moving at a velocity of 20m/s

Which is not a source of noise pollution? a)airplanes b)acid rain c)machines d)cars

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)

Observations show that interstellar clouds can have almost any shape and