How many butter, which has a usable energy content of 6.0 cal/g (= 6000 cal/g), would be equivalent to the change in gravitational potential energy of a 64 kg man who climbs 7.07 km? assume that the average g for the climb is 9.80 m/s^2.

In a system, when potential energy decreases, then entropy also decreases. true false

In the first law of thermodynamics, triangle e=q-w, what does q stand for

An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 ˚f and standard atmospheric pressure, what is the value of the mach number?