1. The number of protons in an atom, unique to each element, is known as the .

To travel at constant speed, a car engine provides 24kw of useful power. the driving force on the car is 600n. at what speed does it travel?

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.

You are about to open a container of soy milk but notice that there are instructions to “shake well before serving.” the soy milk is most likely a