Which moon did the Huygens probe land on?
A) Ganymede
B) Callisto
C) Europa
D) Titan
E) Triton
D) Titan
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Whether or not a planet like Mercury can hold a particular gas in its atmosphere depends on that planet's
a. ice cap. b. craters. c. escape velocity. d. its distance from the Sun as manifested in the temperature of the atmosphere. e. escape velocity and its distance from the Sun as manifested in the temperature of the atmosphere.
The process of bonding small solid particles together at high temperature without melting them is called ______________.
Fill in the blank(s) with the appropriate word(s).
A factory siren indicating the end of a shift has a frequency of 80 Hz where the speed of sound in air is 343 m/s
What frequency is perceived by the occupant of a car that is traveling at 30 m/s (a) towards the factory and (b) away from the factory?
Starship "Alpha" travels at 0.9c past an identical starship "Beta," which is at rest. Both a cabin boy on the "Alpha" and a cook on the "Beta" measure the time required for the other ship to pass by their respective windows. Who measures the longer time?
A. The cabin boy B. Both measure the same time C. The measured times cannot be compared D. The cook