Question

A student evaluates a weight loss program by calculating the number of times she would need to climb a 13.0 m high flight of steps in krder to lose one pound (0.45 kg) of fat. Metabolizing 1.00 kg of fat can releasee 3.77 x10^7 J of chemical energy and the body can convert about 20.2% of this into mechanical emergy (the rest goes into internal energy.) A) How much mechanical energy (in J) can the body produces from 0.450 kg of fat? B) how many trips up the floght of steps are required for the 82.0kg student to lose 0.450 kg of fat? Ignore the relatively small amount of energy requires to return down the stairs.

          A student evaluates a weight loss program by calculating the number of times she would need to climb a 13.0 m high flight of steps in krder to lose one pound (0.45 kg) of fat. Metabolizing 1.00 kg of fat can releasee 3.77 x10^7 J of chemical energy and the body can convert about 20.2% of this into mechanical emergy (the rest goes into internal energy.)
A) How much mechanical energy (in J) can the body produces from 0.450 kg of fat? 
B) how many trips up the floght of steps are required for the 82.0kg student to lose 0.450 kg of fat? Ignore the relatively small amount of energy requires to return down the stairs.

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Added by Stacey T.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Averell Hause

10/09/2019

Step 1

450 kg of fat. Given that metabolizing 1.00 kg of fat releases 3.77 x 10^7 J of chemical energy, we can find the energy released from 0.450 kg of fat by multiplying this value by 0.450: \[ \text{Chemical energy} = 0.450 \, \text{kg} \times 3.77 \times 10^7 \, Show more…

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A student evaluates a weight loss program by calculating the number of times she would need to climb a 13.0 m high flight of steps in krder to lose one pound (0.45 kg) of fat. Metabolizing 1.00 kg of fat can releasee 3.77 x10^7 J of chemical energy and the body can convert about 20.2% of this into mechanical emergy (the rest goes into internal energy.) A) How much mechanical energy (in J) can the body produces from 0.450 kg of fat? B) how many trips up the floght of steps are required for the 82.0kg student to lose 0.450 kg of fat? Ignore the relatively small amount of energy requires to return down the stairs.

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