Considering that the potential energy of the block at the table is mgh/3 and that on the floor is −2mgh/3, what is the change in potential energy δu of the block if it is moved from the table to the floor?

Explanation:

The change in potential energy is the difference between the energy at the floor level and the energy at the level of the table:

Given these two points and an unknown m and h, the change in the potential energy due to the "fall" from table to the floor is -mgh

answer; i believe the correct answer is (40,000 j) good luck

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.