1) Which of the following is NOT included in the internal energy of a system? A)

Question

1) Which of the following is NOT included in the internal energy of a system?
A) the kinetic energy of the center of mass
B) the kinetic energy of the individual particles
C) the spring potential energy of the individual particles
D) the chemical energy of the individual particles
E) the nuclear energy of the individual particles

2) An exerciser of mass 90.0 kg walks up a flight of stairs that are 12.0 meter high. What is the energy of the exercise in Calories?
A) 8.55
B) 7.32
C) 4.66
D) 2.53
E) 1.85

Explanation / Answer

A) the kinetic energy of the center of mass 2)energy=mgh=90*9.8*12/4180 cal= 2.532cal 2.)D

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