In this figure, 10 calories of heat are added to each of the two samples of the same gas. Why is T1 greater than T2?
a. There are fewer atoms or molecules in the smaller object, so each atom (molecule) must move more vigorously for a given amount of heat (energy) transferred to the material.
b. The thermometer is able to absorb heat from the smaller object more rapidly.
c. This follows from the ideal gas law.
a
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A proton (+1.6 × 10^-19 C) moves 10 cm on a path in the direction opposite to a uniform electric field of strength 3.0 N/C. How much work is done on the proton by the electrical field?
a. 4.8 × 10^-20 J c. zero b. 1.6 × 10^-20 J d. -4.8 × 10^-20 J
A 1200-kg car moving at 15.6 m/s suddenly collides with a stationary car of mass 1500kg. If the two vehicles lock together, what is their combined velocity immediately after the collision?
A) 12.1 m/s B) 8.6 m/s C) 6.9 m/s D) 5.5 m/s
Andrea and Chuck are riding on a merry-go-round. Andrea rides on a horse at the outer rim of the circular platform, twice as far from the center of the circular platform as Chuck, who rides on an inner horse. When the merry-go-round is rotating at a constant angular speed, Andrea's angular speed is
1.twice Chuck's. 2.the same as Chuck's. 3.half of Chuck's. 4.impossible to determine.
If a substance is radioactive it is definitely
a. dangerous b. emitting alpha particles c. glowing d. useful e. all of the above f. none of the above Indicate whether the statement is true or false