Which moon has a thick atmosphere made mostly of nitrogen?
A) Titan
B) Triton
C) Ganymede
D) Europa
A) Titan
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An electron follows a circular path (radius = 15 cm) in a uniform magnetic field (magnitude = 3.0 G). What is the period of this motion?
A. 0.12 ?s B. 1.2 ms C. 0.18 ?s D. 1.8 ms E. 1.8 ?s
Two radio antennas are 120 m apart on a north-south line. The two antennas radiate in phase at a frequency of 5.6 MHz
All radio measurements are made far from the antennas. What is the smallest angle, reckoned north of east from midway between the antennas, at which destructive interference of the two radio waves occurs? (c = 3.00 × 108 m/s) A) 13° B) 6.4° C) 9.7° D) 16° E) 19°
Rocks formed from consolidated sediment deposited in layers are known as _____________ rocks
a. crystalized b. foliated c. igneous d. sedimentary
Positive work can be done
a. by friction on the tires when a car is accelerating without skidding. b. by a spring when it launches a clown in the air. c. by a hand throwing a ball. d. by all of the above. e. only by (b) and (c) above.