In order for life to survive in the atmospheres of Jupiter and Saturn it would have to
A) be high in the atmosphere where it could collect solar radiation
B) be at the center, close to the rocky core where a rocky surface exists
C) be large and buoyant, allowing it to maintain a stable altitude in the atmosphere
D) float on the surface of the layer of liquid metallic hydrogen
C
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Discuss the solution to the flatness problem and horizon problem of the Universe
What will be an ideal response?
Suppose we use a baseball to represent Earth. On this scale, the other terrestrial worlds (Mercury, Venus, the Moon, and Mars) would range in size approximately from that of
A) a dust speck to a golf ball. B) a golf ball to a baseball. C) a dust speck to a basketball. D) a golf ball to a beach ball.
An 80.0-kg object is falling and experiences a drag force due to air resistance. The magnitude of this drag force depends on its speed, v, and obeys the equation What is the terminal speed of this object?
A) 6.45 m/s B) 72.2 m/s C) 34.2 m/s D) 12.6 m/s E) 47.3 m/s
A difference between the special and general theories of relativity is that
A. special relativity is valid only in stationary reference frames. B. special relativity deals with accelerated systems. C. general relativity deals with accelerated systems. D. general relativity only deals with swiftly moving objects.