A waterfall is 70 m high. What is the increase in water temperature at the bottom of the falls if all the initial potential energy goes into heating the water? (g = 9.8 m/s2, cw = 4186 J/kg•°C)
a. 0.16°C
c. 0.69°C
b. 0.34°C
d. 1.04°C
A
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A given metal has a magnetic susceptibility of 100,000. This metal is
(a) Diamagnetic. (b) Antiferromagnetic. (c) Ferromagnetic. (d) Paramagnetic.
A battery has an internal resistance of 4.0 W. Which of the following load resistors would have the most power delivered to it when connected across the battery?
a. 1.4 W b. 2.0 W c. 4.0 W d. 8.0 W e. 16 W
What would be the consequence(s) of more frequent collisions between planets and asteroids?
A) Earth and other planets would have more large craters. B) We would observe more meteor showers. C) We would find more Martian meteorites on Earth. D) A and B E) A and C
What is the index of refraction inside a certain transparent material if the critical angle is found to be 48.° (air is outside)?
A) 1.49 B) 1.48 C) 1.35 D) 0.743 E) 1.22