An 800 N man stands on a scale in a motionless elevator. When the elevator begins to move, the scale reads 650 N. Find the magnitude and direction of the elevator’s acceleration.

Net force = 800 – 650

= 150 N

150 = (800 ÷ 9.8) a  

a = 1470 ÷ 800

= 1.8375 m/s^2, downwards

dopamine..

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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.