Based on all we know about the terrestrial worlds, what single factor appears to play the most important role in a terrestrial planet's geological destiny?
A) its size
B) its composition
C) its distance from the Sun
D) whether or not it has liquid water
A) its size
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A proton is moving in an electric field. The direction of the acceleration of the proton is
A. in the direction the proton is moving. B. opposite the direction the proton is moving. C. perpendicular to the direction the proton is moving. D. in the direction of the electric field. E. opposite the direction of the electric field.
Why are interstellar absorption lines so narrow compared to the width of lines which originate in the photospheres of stars?
What will be an ideal response?
A projectile is projected from the origin with a velocity of 25.0 m/s at an angle of 50.0 degrees above the horizontal. What is the time of maximum height of the projectile?
A. 1.95 s B. 2.03 s C. 2.67 s D. 3.01 s E. 3.45 s
Which is the law of reflection?
a. The angle of incidence is the complement of the angle of refraction. b. The angle of incidence is one-half the angle of refraction. c. The angle of transmission is equal to the angle of incidence. d. The angle of incidence equals the angle of reflection. e. The angle of incidence is twice the angle of reflection.