Greater than, I believe. 5x10 = 50. -4 is the opposite of +4 and 1.0 is just like the positive number one.
2.50 × 10 ^-5. Move your decimal until you get a whole number. Then count how many times you moved it and that is your exponent. So your exponent is -5 because you're going to the left, if you're going to the right it would be a positive number.
Energy is released and mass is reduced
Charle: V1/T1=V2/T2
Gay lussac: p1/T1=p2/T2
Google will help you with this
