The only force acting on a 1.8-kg body as it moves along the x axis is given by Fx = -(3.0x) N, where x is in m. If the velocity of the body at x = 0 is vx = +8.0 m/s, at what value of x will the body have a velocity of +4.0 m/s?
a. 5.7 m
b. 5.4 m
c. 4.8 m
d. 4.1 m
e. 6.6 m
B
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The tunneling current in an STM is _________dependent upon the negative of the gap between the tip and the specimen.
Fill in the blank(s) with the appropriate word(s).
A quanton is moving in a classically allowed region. If the quanton would classically have at point xA twice the kinetic energy it would have at point 
, how would the wavelengths of an energy eigen function of the quanton compare at these points?
A. ?A = 2?B
B. ?A = 
?B
C. ?B = ?A
D. ?B = 2?A
E. ?B = 4?A
This bar graph is based on statistical study of results from the Kepler mission. Which of the following conclusions is supported by the graph?
A) At least about 15% of stars have a planet similar in size to Earth. B) Most stars with an Earth-sized planet do not have any larger jovian planets orbiting far from their stars. C) Most stars have five planets. D) A star orbited by a super-Earth is likely also to be orbited by a mini-Neptune.
Suppose that the star Betelgeuse (the upper left shoulder of Orion) were to supernova tomorrow (as seen here on Earth). What would it look like to the naked eye?
A) Betelgeuse would remain a dot of light but would suddenly become so bright that for a few weeks we'd be able to see this dot in the daytime. B) We'd see a cloud of gas expanding away from the position where Betelgeuse used to be. Over a period of a few weeks, this cloud would fill our entire sky. C) Because the supernova destroys the star, Betelgeuse would suddenly disappear from view. D) Betelgeuse would suddenly appear to grow larger in size, soon reaching the size of the full Moon. It would also be about as bright as the full Moon.