What is (are) the unit(s) for the diffusion constant?
a. m2
b. m2/s
c. It is unitless.
d. m/s1/2
B
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A car traveling at 100 km/h strikes an unfortunate bug and splatters it. The force of impact is
A) greater on the bug. B) greater on the car. C) the same for both.
Uranus completes an orbit around the Sun every 84 years and spins once every 17 hours, approximately. Which of the following could be observed from the planet Uranus?
A. one sunrise every 17 hours on the equator B. nights lasting several years near the pole tipped away from the Sun C. days lasting several years near the pole tipped toward the Sun D. season cycle of 84 years near the poles E. All of these choices are correct.
An RLC series circuit has R = 100 ohms, C = 25 ?F, and L = 0.16 H. For what angular frequency of an AC voltage is the current flow maximum?
A. 251 rad/s B. 500 rad/s C. 757 rad/s D. 884 rad/s E. 79.6 rad/s
At a restaurant you are served coffee before you are ready to drink it. In order that the coffee be the hottest when you are ready for it, when would it be best to add cream (at room temperature) to it?
a. when you are ready to drink it b. right when you are served the coffee c. it doesn't matter, as the final temperature will be the same