What is the impact velocity of a ball that is thrown vertically downwards with an initial speed of 4.6 m/s from the edge of a building 15.5 m in height?

A150 w lamp emits light of wavelength 590 nm uniformly in all directions. what is the photon flux (photons per unit area per unit time) on a small screen at a distance 2.3 m from the lamp? assume the photons are uniformly distributed over the surface of a sphere of radius 2.3 m.

Sound is a disturbance that travels through a medium as a

Observations show that interstellar clouds can have almost any shape and