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Please show all work, and include units in the calculation. The human brain consumes about 22...

Please show all work, and include units in the calculation.

The human brain consumes about 22 W of power under normal conditions, though more power may be required during exams. (a) For what amount of time can one Snickers bar (280 Cal per bar) power the normally functioning brain? (b) At what rate must you lift a 3.6-kg container of milk (one gallon) if the power output of your arm is to be 22 W? (c) How much time does it take to lift the milk container through a distance of 1.0 m at this rate?

science   Anatomy-And-Physiology   
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Answer #1

a) Amount of time to power Human brain which consumes 22 watts with 280 Cal bar of snickers is Work (W) Power (P)Time (t) Work (W)in joules Power (P) in watts or Joules/sec time (t)- 280 X 4186 53276 seconds or 14.79 hours b) Rate at which arm should lift a weight is is Velocity Vmeters Per Second (m/s) Weight or Force to be lifted is 3.6 kgs Power of the arm is 22 Watts or 22 Joules /second Power (P)-Force X Velocity Power (P) Velocity Force (F) Then 22 Joules per second 3.6 N Velocity - 0.611 meters per second C) the rate at which 3.6 kg moved is 0.611 meters per second as derived above Then the time required to move 3.6 kg over 1 meter at the rate mentioned above is 0.6111 meters took 1 second Then time required to move 1 meter at this rate is i.e 0.6111 meters1 second then 1meter is? - 1 meter X 1 Second divided by 0.6111 meters 1X 1 0.6111 1.6 seconds

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