If 480 C pass through a 4.0-? resistor in 10 min, what is the potential difference across the resistor?
A. 3.6 V
B. 2.8 V
C. 2.4 V
D. 3.2 V
E. 5.0 V
Answer: D
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If you hold two objects that have the same weight density, then they
A) may have unequal mass densities. B) have equal mass densities. C) are equal in weight.
Two spaceships approaching each other move at very close to the speed of light, each sending a beam of light to the other. Each measures the speed of light from the other spaceship as
A) slightly less than c. B) c. C) slightly greater than c. D) much greater than c.
A puddle of water (n = 1.33) is covered with a very thin layer of oil (n = 1.20). How thick is the oil in the region that strongly reflects light with a wavelength of 531 nm?
a. 111 nm b. 221 nm c. 443 nm d. 295 nm e. 239 nm
Watts per square meter is a unit for measuring the ______________ of a sound wave
Fill in the blank(s) with correct word