little boy

It must be age of China!

Are the changes of electric potential energy equal for a charge moved from point A to point B(electric potential changes) by every paths?

Isn't there internal energy in a gas, the molecular kinetic energy? In the gas I meant doesn't involve binding and splitting of particles.

After severa days of thinking, I found two possible explanations. The first statement "PE of gas>PE of liquid>PE of solid" is right, but the second statement"In a gas, where the intermolecular forces are weak, the internal energy is entirely molecular KE." is ambiguous first explanation: the statement should be rewrote as "In a ideal gas, where the intermolecular forces are weak(or doesn't exist), the internal energy is entirely molecular KE." second explanation: the statement should be rewrote as "In a gas, where the intermolecular forces are weak, the change of internal energy is entirely change of molecular KE." because the change of volume of gas doesn't involve change of state and the intermolecular forces are weak means insignificant work done on PE I guess the second explanation is the right one.

the book is for (China)Hong Kong A level physics, the author is a chinese

does first law of thermodynamics require the gas being ideal?

I found some contradiction on my book the book states "PE of gas>PE of liquid>PE of solid" but also states "In a gas, where the intermolecular forces are weak, the internal energy is entirely molecular KE." why is the PE of gas not significant while it is largest among the three state?? HELP!