How many slices of bread did each climber have to eat to compensate for the increase of the gravitational potential energy of the system climbers-earth? (one piece of bread releases about 1.0×106j of energy in the body.) assume that the height of mt. everest is 8850 m, the weight of a person is about 79 kg , and efficiency in converting the body's chemical energy into mechanical work is 10.5 %.

So No of slices to be consumed by each person = n = 65

Explanation:

Energy released by one slice = E1

h = 8850 m ; m = 79 kg ,η= 10.5%

We know that potential energy given as

u = m g h

u = 79 x 9.81 x 8850

we know from the defination of efficiency that,  η= E(out)/E(in)

Now amount of PE has to be compensated, In our case, E(out) =u

Let n be the number of bread slices to be consumed.

n = E(in)/E1

n=64.76

So No of slices to be consumed by each person = n = 65

increases it

it is called kinetic energy