In a bucket of water, the instantaneous speed of the molecules is closest to
A. zero, since they don't move
B. whatever speed the wood is moving
C. approximately 1.7 meters per second
D. approximately 1000 feet per second
E. approximately 186,000 miles per second
Answer: D. approximately 1000 feet per second
You might also like to view...
A wire, 6.0 m long, with a mass of 10 g, is under tension. A transverse wave is propagated on the wire, for which the frequency is 280 Hz, the wavelength is 0.60 m, and the amplitude is 8.4 mm
The time, for a crest of the transverse wave to travel the length of the wire, in ms, is closest to: A) 36 B) 31 C) 40 D) 44 E) 49
A saber-toothed-tiger's bones contain 1/32 of the amount of 14C that is contained in the bone material of living animals. The half-life of 14C is 6000 years. From this information, we can conclude
A) that the tiger died about [i.e., plus or minus a few thousand years] 42,000 years ago. B) nothing at all, because 14C dating is known to be inaccurate. C) nothing at all, because of the uncertainties associated with radioactive decay. D) that the tiger died about 18,000 years ago. E) that the tiger died about 30,000 years ago.
A neutron in a nuclear reactor makes an elastic head-on collision with a carbon atom initially at rest. (The mass of the carbon atom is 12 times that of the neutron.) What fraction of the neutron's original kinetic energy is retained by the neutron?
a. 14.4% c. 41.4% b. 28.4% d. 71.6%
In a collision the total ____________ is the same before and after
Fill in the blank(s) with correct word