How would the inward migration of a Jovian-like planet in an extrasolar planetary system alter the probability of Life appearing?
A) it would improve chances since it would protect inner, Terrestrial-like planets from impacts
B) it would improve chances slightly since some of the Terrestrial planets may become moons of the Jovian planet
C) it would greatly decrease the chance since the orbits of the inner, Terrestrial-like planets would be disrupted
D) it would make no difference at all
C
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Peak frequency as noted on a radiation curve is directly proportional to the
A) frequency of waves emitted. B) wavelength of waves emitted. C) temperature of emitted radiation. D) temperature of the emitter. E) none of the above
A particle (m = 20 mg, q = ?5.0 ?C) moves in a uniform electric field of 60 N/C in the positive x direction. At t = 0, the particle is moving 25 m/s in the positive x direction and is passing through the origin. How far is the particle from the origin at t = 2.0 s?
a. 80 m b. 20 m c. 58 m d. 10 m e. 30 m
As a hiker descends a hill, the work done by gravity on the hiker is
A. positive and depends on the path taken. B. negative and depends on the path taken. C. positive and independent of the path taken. D. negative and independent of the path taken.
A 40-kg box is being pushed along a horizontal smooth surface. The pushing force is 15 N directed at an angle of 15° below the horizontal. What is the magnitude of the acceleration of the crate?
A) 0.16 m/s2 B) 0.36 m/s2 C) 0.47 m/s2 D) 0.39 m/s2 E) 0.68 m/s2