Which two factors are used to calculate the kinetic energy of an object? gravity and velocity
velocity and mass
mass and volume
volume and height

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

Can someone me with 1 to 4 plz. fast

Nonpoint source pollution is difficult to control because it