How was bohr's atomic model similar to rutherford's model? a. it assigned energy levels to electrons. b. it described electron positioning in terms of the electron cloud model. c. it described how electrons gain or lose energy. d. it described a nucleus surrounded by a large volume of space.

Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?

Acharge of 8.4x10^-4 c moves at an angle of 35 degrees to a magnetic field that has a field strength of 6.7x10^-3 t. if the magnetic force is 3.5 x10 ^-2 n, how fast is the charge moving?

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?