An apple falls from a tree and hits the ground 11.9 m below. with what speed will it hit the ground? the acceleration of gravity is 9.8 m/s 2 . answer in units of m/s.

Explanation:

An apple falls from a tree and hits the ground 11.9 m below. We need to find the speed with which it hits the ground. It can be calculated using the conservation of energy as :

v = 15.2 m/s

So, the speed with which it hits the ground is 15.2 m/s. Hence, this is the required solution.

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.

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