Answer:
10 Hz
Explanation:
Frequency of wave is given by
f= v / lambda
f= 30 / 3
f= 10
Contact- Frictional force (Needs to be rubbing against the toy for it to happen)
Non Contact- Probably…? Gravitational force (Doesn’t need to be touching for it to happen)
Answer:
275 kJ
Explanation:
KE = ½mv² = ½(1200)(25²) = 375,000
Answer:
Population inversion, in physics, the redistribution of atomic energy levels that takes place in a system so that laser action can occur. Although absorption and emission of energy is a continuous process, the statistical distribution (population) of atoms in the various energy states is constant. ...
laser inversion is photon that can stimulate the production of other photons of exactly the same wavelength because of stimulated emission of radiation.
Explanation: