A spaceship leaves Earth and maintains a constant force by means of a nuclear engine. As the speed of the spaceship increases, an observer on Earth finds that relative to her the magnitude of the spaceship's acceleration is
a. 0.
b. decreasing.
c. constant.
d. increasing.
e. proportional to the kinetic energy of the spaceship.
b
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A 2.0-mol ideal gas system is maintained at a constant volume of 4.0 L. If 200 J of heat is added, what is the work done on the system?
a. zero c. –6.7 J b. 5.0 J d. 20 J
John rapidly pulls a plunger out of a cylinder. As the plunger moves away, the gas molecules bouncing elastically off the plunger are
a. rebounding at a higher speed than they would have if the plunger weren't removed. b. rebounding at a lower speed than they would have if the plunger weren't removed. c. rebounding at the same speed as they would have if the plunger weren't removed. d. Whether they speed up or slow down depends on how fast the plunger is removed.
A 12-oz can of soft drink contains about
A. 10 Calories B. 50 Calories C. 150 Calories D. 2000 Calories
As the principal quantum number of the Hydrogen atom increases, what does the spacing between adjacent energy levels do?
A. Decreases B. Increases C. Stays the same