A student fires a cannonball horizontally with a speed of 31.0m/s from the top of a building. The cannonball remains in the air for 4.60s. Neglect drag.
From what height was the cannonball launched?
m
How far from from the base of the building will the ball land (measured along
the ground)?
m

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.

unbalanced force

explanation:

i don't understand. explain it clearly

b. a lightning bug, plug of grass, and a worm