An object falls freely from a height of 25m onto the roof of a building 5m high Calculate the velocity with which the object stricks the roof
calculate the maximum height of a ball of mass 1.4kg will attain if projected vertically upward with an initial velocity of 17m/s

(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.)

An element becomes a positively charged ion when itloses protons.loses electrons.gains electrons.gains neutrons.

What is the relationship between globular clusters and the milky way?