The time taken by the Moon to circle the sky once and return to the same position among the stars is known as the Moon's _____
A) synodic period
B) annular period
C) sidereal period
D) ecliptic period
C
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Why are clay surfaces good at promoting the formation of biological polymers?
A) they are the only types of material monomers will stick to B) they bring monomers close together, allowing them to react with each other C) they are very common on the Earth D) clays are made of biological polymers
The average intensity of the sunlight in Miami, Florida, is 1.04 kW/m2. For surfaces on which the light is all absorbed,
what is the average value of the radiation pressure due to this sunlight in Miami? (c = 3.00 × 108 m/s, ?0 = 4? × 10-7 T ? m/A, ?0 = 8.85 × 10-12 C2/N ? m2) A) 9.78 µPa B) 2.28 µPa C) 6.93 µPa D) 1.73 µPa E) 3.47 µPa
The primary evidence that the outer core is molten is an abrupt
A) increase in the velocity of P-waves, but no increase in S-waves. B) increase in the velocity of L-waves. C) stop of S-wave propagation, and a decrease in P-wave velocity. D) stop of P-wave propagation, and a decrease in S-wave velocity.
The amount that light of a distant galaxy is bent by the gravity of a nearby cluster of galaxies
A: allows us to measure the mass of the cluster. B: proves that dark matter does not exist in clusters. C: allows us to measure the mass of the galaxy.