Conservation of energy for a planet
112308
Why is the gravitational potential energy defined as negative?
131167
Kinetic energy of the object, but Potential energy of the system: Why is it so?
123654
How can energy be useful when it is 'abstract'?
78304
Does it require more energy to maintain higher temperature in the same environment?
119004
Proof of conservation of energy?
54174
Conversion of mass to energy in chemical/nuclear reactions
8077
Photons in expanding space: how is energy conserved?
22168
What keeps mass from turning into energy?
6592
if a body is stopped by means other than friction, where does energy go?
84458
What's the real fundamental definition of energy?
79614
Many-worlds: Where does the energy come from?
63428
Rotating Cone - Finding Energy and Momentum
89194
Potential at Center of Earth
145238
Where does the energy required to stop a moving body come from and go?
70033
Marvin the Martian vs. the Death Star: how much energy will they actually need to disintegrate the Earth?
36381
earth; the earth
46509
Energy level below ground state