A bystander sees a blue car moving to the right at 40 mph and at the same time the bystander sees a police car approaching in the opposite direction at 60 mph. A) What is the speed of the police car with respect to the blue car? B) What is the speed of the police co-pilot with respect to the police driver?

What happens when a rubber rod is rubbed with a piece of fur?

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?

Directions: count the number of atoms. ar co2 na3po4 so3 nac2h3o2