How is Titan, the moon of Saturn, similar to the Earth?
A) like the Earth, Titan has an atmosphere made mostly of molecular nitrogen
B) Titan, like the Earth, has an internal magnetic field
C) like the Earth, Titan has oceans of liquid water on its surface
D) Titan is almost the same size as the Earth
A
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Under which of the following conditions would a car have a westward acceleration?
A) As a car travels eastward with its velocity is increasing. B) A a car travels eastward with its velocity is decreasing. C) As a car travels westward with its velocity is decreasing. D) As a car travels westward with its velocity is constant. E) As a car travels eastward with its velocity is constant.
A tank with a volume of 0.200 m3 contains 27.0°C helium gas at a pressure of 63.5 atm. How many balloons can be blown up if each filled balloon is a sphere 30.0 cm in diameter at 27.0°C and absolute pressure of 1.20 atm? Assume all the helium is transferred to the balloons
a. 1180 balloons c. 749 balloons b. 884 balloons d. 375 balloons
A 1000-kg car is moving at 15 km/h. If a 2000-kg truck has 23 times the kinetic energy of the car, how fast is the truck moving?
A) 51 km/h B) 72 km/h C) 61 km/h D) 41 km/h
What do we currently believe was the main source of the Earth's oceans and atmosphere?
A) impacts by icy planetesimals B) outgassing by volcanoes C) material directly accreted from the solar nebula D) melting and vaporization of polar glaciers