The energy required to accelerate an interstellar spaceship depends on
A) its mass only
B) its final velocity only
C) the type of fuel it uses
D) its mass and final velocity
Question 2Even though Venus is almost the same size as the Earth it does not have plate tectonics. This is most likely because
A) it has cooled more rapidly so that there is not enough internal convection to break up its crust
B) it has no oceans for subduction and seafloor spreading to occur in
C) due to the high temperatures at its surface, its crust has dried up and thickened so it cannot break up into plates
D) impacts have filled its plate boundaries essentially turning the process off
Question 3A ball is attached to a string and revolves in a horizontal circle with angular momentum. When the string breaks at point B on the circumference, the ball moves off tangentially along path B-Q.
As it moves along B-Q, increasing its distance from the center of the circle, its angular momentum A) decreases.
B) is now zero.
C) remains constant.
D) increases.
Question 4The curved surface of a 50. cm focal length plano-convex lens has a radius of curvature of 30. cm. What is the refractive index of the glass?
What will be an ideal response?
Question 5The cosmic speed limit, the speed of light is established by
A) Newton's Laws of Motion
B) Einstein's General Theory of Relativity
C) Einstein's Special Theory of Relativity
D) Kepler's Laws of Planetary Motion
Question 6The Moon, Mercury, and Mars do not have plate tectonics because
A) they have cooled so rapidly that they do not have enough internal convection to break up their thick crusts
B) they have no oceans for subduction and seafloor spreading to occur in
C) impacts have filled in the plate boundaries essentially turning the process off
D) their crusts have dried up and thickened so the crust cannot be broken up into plates
Question 7My flashlight beam makes an angle of 60. degrees with the surface of the water before it enters the water. In the water what angle does the beam make with the surface?
A) 0
B) 30
C) 60
D) 22
E) 68
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