Acar skids 18 m on a level road while trying to stop before hitting a stopped car in front of it. the two cars barely touch. the coefficient of kinetic friction between the first car and the road is 0.80. a policewoman gives the driver a ticket for exceeding the 35 mi/h speed limit.
determine the initial speed of the car.

What color of light must blue light mix with to create white light? a. yellow b. white c. blue d. green

Agroup of monkeys is trying to cross the river in a rowboat. the maximum buoyant force on the rowboat is 2,000 n. the weight of the rowboat is 1,000 n. each monkey has a weight of 150 n. how many monkeys can safely cross in the rowboat at one time? explain your reasoning, including any calculations you used to find the answer.

Aparticle of mass m is placed in a one-dimensional box of length l. the box is so small that the particle’s motion is relativistic, so that e p2/2m is not valid. (a) derive an expression for the energy levels of the particle using the relativistic energy–momentum relation and the quantization of momentum that derives from connement. (b) if the particle is an electron in a box of length l 1.00 1012 m, nd its lowest possible kinetic energy. by what percent is the nonrelativistic formula for the energy in error?