What is the mass of an object that has a weight of 75.9 N?

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.

Around faucet handle is part of a(n) a. lever b. screw c. inclined plane d. wheel and axle

Which of the following are not typically included in the periodic table? a. atomic mass b. element symbol c. isotopes d. number of electrons