Acyclist rode an average speed of 10 miles per hour for 15 miles how long was the ride

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.

The plum pudding model of the atom state that ?

What is a carrier wave and how does it affect what you hear on the radio