2.) An 800.0 kg sports car slows to 13.0 m/s on the highway to check out the wildflowers and is struck from behind by a 1200 kg pick up traveling at 25.0 m/s. the pick up truck and the sports car's bumper lock together after the rear-end collision. calculate the velocity the two vehicles will move off together.

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?

What happens when the number of protons in an atom changes

Use vsepr theory to predict the molecular geometry of the molecule hcn.