At what phase would tidal variation be the least during the entire day?
A) new moon
B) first quarter
C) waxing gibbous
D) full moon
E) waning crescent
B
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Three particles are placed in the xy plane. A 40-g particle is located at (3, 4) m, and a 50-g particle is positioned at (?2, ?6) m. Where must a 20-g particle be placed so that the center of mass of this three-particle system is located at the origin?
a. (?1, ?3) m b. (?1, 2) m c. (?1, 12) m d. (?1, 7) m e. (?1, 3) m
The dominant dark features on the near side of the Moon are the ________
Fill in the blank(s) with correct word
What is the speed of sound in air at a temperature of –110 °F?
a. 279 m/s b. 407 m/s c. 256 m/s d. 3 470 m/s
What is the total mass of the Earth's atmosphere? (The radius of the Earth is 6.4 × 10^6 m, and atmospheric pressure at the surface is 105 N/m2.)
a. 5 × 10^16 kg c. 5 × 10^18 kg b. 1 × 10^18 kg d. 1 × 10^20 kg