Determine the debroglie wavelength for an electron moving at 7.3 x 107 m/sec.

a. 1.0 x 10-11 m

b. 5.1 x 104 m

c. 5.9 x 10-23 m

d. 2.9 x 10-7 m

An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. what other characteristic does the radiation have?

When the displacement of a mass on a spring is 12a the half of the amplitude, what fraction of the mechanical energy is kinetic energy? at what displacement, as a fraction of a, is the mechanical energy half kinetic and half potential?

What kind of simple machine is a catapult?