8. Centripetal Forces & Gravitation

To determine the total energy of an electron in a circular orbit around a nucleus, which of the following values must be known?

In nuclear power plants, what happens to the heat produced from fission reactions?

Assuming $50\%$ efficiency, $150$ kcals of chemical energy would result in how much kinetic energy?

The 12,000-kg Lunar Command Module is in a circular orbit above the Moon's surface. If it spends ¼ of its fuel energy ($-1.74\times 10^9$ J) bringing it to a circular orbit just above the surface, how high was its original orbit?

In the context of the energy released by earthquakes, if a magnitude $7$ earthquake occurs, how much more energy does it release compared to a magnitude $4$ earthquake?

Approximately how much energy (in $J$) does one tablespoon of peanut butter contain?

A block of mass $m$ moves in a horizontal circular orbit of radius $r$ with initial speed $v_0$. Due to friction, the block eventually comes to rest. What is the total amount of energy $e$ dissipated by friction by the time the block stops?

3) What is the standard unit of measurement for $K=\frac{1}{2}m{v}^2$ (kinetic energy) in the context of circular orbits?

For a hydrogen atom in an excited state, what is the energy of the electron in the $n_4$ level?

How does the total heat energy radiated by Jupiter compare to the amount of energy it receives from the Sun?

When you bounce a ball, it eventually stops bouncing. Where does the energy of the ball go?

The 75,000 kg space shuttle used to fly in a 250-km-high circular orbit. It needed to reach a 610-km-high circular orbit to service the Hubble Space Telescope. How much energy was required to boost it to the new orbit?

a) How much work do you have to do on a 100-kg payload to move it from Earth's surface to a height of 1000 km?

b) How much additional work must you do to put this payload into orbit at this altitude?