There would be only one ocean tide per 24-hour day if the
A) Earth and Moon were equally massive.
B) Moon were more massive than Earth.
C) Sun's influence on the tides were negligible.
D) Moon's mass were small — only a few kilograms.
E) none of the above
Answer: E
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A planet with its rotation axis tilted by 40 degrees relative to its orbital plane aroundits star would:
a) have dark all the time on the South pole during its winter b) have shorter days and nights than those of Earth c) have longer years than those of Earth d) have longer days and nights than those of Earth e) have dark all the time on the North pole during its summer
Bottles of perfume sometimes have thick glass (n = 1.5) walls which give the impression the volume is larger than it really is. Assume a cylindrical bottle with an inner radius of 1.0 cm and an outer radius of 2.0 cm. What percentage of the apparent volume is the real volume?
A. 95% B. 60% C. 80% D. 64% E. 75%
An ideal Carnot engine is operated between a hot and a cold reservoir. The temperature difference between the two reservoirs is 284°C. If the efficiency of this ideal engine is 24.0%, find the temperature of the cold reservoir in degrees Celsius
What will be an ideal response?
If a ?- particle at rest decays into a neutron and a ?- , what is the total kinetic energy of the decay products?
The masses of ?-, neutron, and ?- are 1197 MeV/c2, 940 MeV/c2, and 140 MeV/c2, respectively.