A solid cylindrical bar conducts thermal energy at a rate of 25 W from a hot to a cold reservoir under steady state conditions
If both the length and the diameter of this bar are doubled, the rate at which it will conduct thermal energy between these reservoirs will be A) 200 W
B) 100 W
C) 50 W
D) 25 W
E) 12.5 W
C
You might also like to view...
A girl throws a stone straight down from a bridge. The stone leaves her hand with speed of 8.00 m/s at a height of 12 m above the water below. How much time does it take for the stone to hit the water?
A) 2.58 s B) 0.95 s C) 1.8 s D) 0.41 s E) 17.3 s
Moment of Inertia: The figure shows scale drawings of four objects, each of the same mass and uniform thickness, with the mass distributed uniformly. Which one has the greatest moment of inertia when rotated about an axis perpendicular to the plane of the drawing at point P?
A. A B. B C. C D. D E. The moment of inertia is the same for all of these objects.
Comparative planetology: Describe at least one way in which comparisons of Earth with the Moon, Mercury, Venus, and / or Mars have helped us to better understand our own planet
What will be an ideal response?
An excited atom can lose energy by
a. emitting a photon. b. absorbing a photon. c. undergoing the photoelectric effect. d. increasing its de Broglie wavelength. e. the uncertainty principle.