The driver of a car slams on the brakes when he sees a tree blocking the road. the car slows uniformly with acceleration of -5.90 m/s2 for 4.15 s, making straight skid marks 62.3 m long, all the way to the tree. with what speed does the car then strike the tree?

Diamond will scratch quartz. true or false

Exercise 2. find the wavelength of a photon emitted when an electron jumps from the n = 3 energy level down to the n = 2 energy level. where is this photon in the electromagnetic spectrum?

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?