A steady beam of alpha particles (q = +2e), each traveling with kinetic energy of 24 MeV, carries a current of I = 260 nA. a) If the beam is directed perpendicular to a planar surface, how many alpha particles strike the surface in 3 s? b) Through what potential difference was it necessary to accelerate each alpha particle from rest to bring it to a kinetic energy of 24 MeV

Modify the equation fδt=δ (mv) to find the force of friction.

Which of the following is not a characteristic of s waves? a. travel slower than p waves. b. cannot be detected in locations more than 105° from an earthquake’s epicenter. c. travel through solids and liquids. d. only affect coastal regions.

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?