A train is moving parallel and adjacent to a highway with a constant speed of 30 m/s. Initially a car is 50 m behind the train, traveling in the same direction as the train at 44 m/s and accelerating at 2 m/s2. What is the speed of the car just as it passes the train?

How does the kinetic energy of a charge change as the charge moves under the effect of an electric field from higher potential to lower potential? a.the kinetic energy increases.b.the kinetic energy decreases.c.the kinetic energy remains the same.d.the kinetic energy is always zero.

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?

At what time will the interfering waves have an amplitudeof zero?