An ideal gas is confined to a container with constant volume. The number of moles is constant. By what factor will the pressure change if the absolute temperature triples?
a. 1/9
b. 1/3
c. 3
d. 9
c
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In which case would the net force due to water pressure on a solid object be greater?
(i) when the object is in water at 100-meter depth (ii) when the object is in water at 200-meter depth
1.(i) 2.(ii) 3.Choices (i) and (ii) would have the same net force due to the water on them. 4.It depends on the orientation of the object.The motion of a piston in an automobile engine is nearly simple harmonic. If the 1-kg piston travels back and forth over a distance of 12.0 cm, what is its maximum speed when the engine is running at 3000 rpm?
a. 4.71 m/s c. 44.0m/s b. 9.42 m/s d. 22.0 m/s
An atom of helium can store energy by bumping an electron from its lowest orbital energy state to a higher orbital energy level. In particular, moving an electron from the lowest state to the next-lowest state would store an energy of 24.6 eV. Why can we ignore this energy storage mode when calculating the heat capacity of helium gas?
A. This mode is “frozen” out at normal temperatures. B. Collisions between atoms can’t influence the energy levels of electrons inside the atoms. C. This storage mode is completely independent of the kinetic and/or rotational energy modes. D. Only modes involving helium molecules count. E. We have ignored this mode only for simplicity’s sake. F. Some other reason (specify).
Exhibit 12-1
The figure below shows a graph of angular velocity versus time for a woman bicycling around a circular track.
?
?
Use this exhibit to answer the following question(s).
Refer to . How many revolutions does she complete in the first 12 minutes?
a.
4
b.
8
c.
12
d.
16
e.
32