What maximum power can be generated from an 18-V emf using any combination of a 6.0-? resistor and a 9.0-? resistor?
a. 54 W
b. 71 W
c. 90 W
d. 80 W
e. 22 W
c
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Two flat rectangular mirrors are set edge to edge and placed perpendicular to a flat nonreflecting surface. A light ray that reflects from mirror 1 at angle ?M1 then strikes the second mirror and reflects at ?M2 such that the angle between the ray reaching mirror 1 and the ray leaving mirror 2 is 180°. The angle between the two mirrors is
a. 0°. b. 45°. c. 90°. d. 150°. e. 235°.
The discovery of Charon was significant because it allowed astronomers to determine the ________ and ________ of Pluto.
A. radius; speed B. age; mass C. speed; distance D. distance; age E. mass; radius
How far apart should two protons be if the electrical force of repulsion is equal to the weight (attraction to the Earth) of one of the protons?
What will be an ideal response?
Compared to a glass of ice water with ice, a glass of plain ice-cold water without ice on a warm day will warm up
A) faster. B) slower. C) in the same amount of time.