Answer:
Each climber had to eat 72 slices of bread to compensate for the increase of the gravitational potential energy of the system climbers-Earth
Explanation:
Hi
One piece of bread releases about [tex]1.0 \times 10^{6}J[/tex] of energy in the body, but efficiency in converting the body's chemical energy into mechanical work is 9.5 %, so [tex]1.0 \times 10^{6}J(9.5\%)=95\times 10^{3} J[/tex].
On the other hand, we need to calculate the total work to reach the top of Mt. Everest , so [tex]W=mgh=(79 Kg)(9.8 m/s^{2})(8850 m)=6.8 \times 10^{6}J[/tex]
Finally, we have that [tex]\# slices=\frac{W}{Energy/Slice} =\frac{6.8 \times 10^{6}J}{95\times 10^{3} J} =72 \ slices \ of \ bread[/tex]
