The volume of an ideal gas changes from 0.40 to 0.55 m3 although its pressure remains constant at 50,000 Pa. What work is done by the system ON its environment?
a. –7500 J
c. 7500 J
b. -200,000 J
d. 200,000 J
C
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In what way is the rocky material of Jupiter's core different from the rocks found on Earth?
a. It is much cooler because Jupiter is further from the sun. b. It contains more liquid water. c. It is much hotter and denser because of the extreme pressure at the core of Jupiter. d. It is not composed of iron and nickel because this material will float of the surface e. It is composed entirely of ices that have frozen into a large rock like structure.
Graphical Analysis: If the velocity versus time graph of an object is a straight line making an angle of +30° (counter clockwise) with the time axis, the object is
A. moving with constant non-zero speed. B. moving with constant non-zero acceleration. C. at rest. D. moving with increasing acceleration.
Conservation of Momentum: A 328-kg car moving at 19.1 m/s in the +x direction hits from behind a second car moving at 13.0 m/s in the same direction. If the second car has a mass of 790 kg and a speed of 15.1 m/s right after the collision, what is the velocity of the first car after this sudden collision?
A. 14.0 m/s B. 18.2 m/s C. 24.2 m/s D. -14.0 m/s
Initially, the light puck is moving east at 3 m/s while the heavy puck is moving west at 2 m/s. The final velocity of the conjoined pucks is
A. Eastward. B. Westward. C. Zero. D. Impossible to determine. E. Some other direction (explain).