At the same instant that a 0.50-kg ball is dropped from 25m above earth,? at the same instant that a 0.50-kg ball is dropped from 25m aboveearth, a second ball, with a mass of 0.25 kg, is thrown straight upward from earth’ssurface with an initial speed of 15m/s. they move along nearby lines and pass each other without colliding. at the end of 2.0 s the velocity of the center of mass of the two-ball system is:

The intensity of a polarized electromagnetic wave is 12 w/m^2. part a) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=0∘ with the plane of polarization? part b) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=30∘ with the plane of polarization? part c) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=45∘ with the plane of polarization? part d) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=60∘ with the plane of polarization? part e) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=90∘ with the plane of polarization?

Aforklift raises a 1,020 n crate 3.50 m up to a shelf. how much work is done by the forklift on the crate? the forklift does j of work on the crate.

What is the relationship between wavelength of light and the quantity of energy per photon?