If you release a single molecule in an evacuated region it will initially
A) fall just as a baseball would.
B) move in any direction.
C) convect upward.
D) be buoyed upward.
E) none of the above
Answer: A
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In addition to 1 m = 39.37 in., the following exact conversion equivalents are given: 1 mile = 5280 ft, 1 ft = 12 in, 1 hour = 60 min, and 1 min = 60 s. If a particle has a velocity of 8.4 miles per hour,its velocity, in m/s, is closest to
A) 3.8 m/s. B) 3.0 m/s. C) 3.4 m/s. D) 4.1 m/s. E) 4.5 m/s.
You are designing an ac generator with a maximum emf of 8.0 V. If the generator coil has 200 turns, each with a cross-sectional area of 0.030 m2, what should be the frequency of the generator in a magnetic field of 0.030 T?
A) 7.1 Hz B) 7.5 Hz C) 8.0 Hz D) 44 Hz
Fish don't live very long in water that has just been boiled and brought back to room temperature. Suggest why
A) There is now a higher concentration of dissolved CImage in the water. B) The nutrients in the water have been destroyed. C) Since some of the water was evaporated while boiling, the salts in the water are now more concentrated. This has a negative effect on the fish. D) The boiling process removes the air that was dissolved in the water. Upon cooling the water is void of its usual air content, hence, the fish drown.
If the current drawn from a 12-volt car battery is 100 amperes when it is short circuited with a wire, the resistance of the wire is 0.12 ohms
a. True b. False Indicate whether the statement is true or false