Which experimental discovery led Niels Bohr to revise Rutherford's model of the atom?
A. Most alpha particles pass straight through a thin sheet of gold
foil.
B. Electrons have more energy the farther they are from the nucleus.
C. A few alpha particles bounce off a thin sheet of gold foil.
D. The beam in a cathode ray tube is moved by an electric force.

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.

An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 ˚f and standard atmospheric pressure, what is the value of the mach number?

If the work required to stretch a spring 3 ft beyond its natural length is 15 ft-lb, how much work is needed to stretch it 27 in. beyond its natural length?