A potential energy function is given by U(x) = (3.00 J)x + (1.00 J/m2)x3. What is the force function F(x) that is associated with this potential energy function?
What will be an ideal response?
Answer: F(x) = -3.00 N - (3.00 N/m2)x2
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Which of the Galilean moons is the densest and most geologically active?
A) Io B) Europa C) Ganymede D) Callisto E) Titan
The core of the Sun is
A) at the same temperature and density as its surface. B) composed of iron. C) constantly rising to the surface through convection. D) at the same temperature but much denser than its surface. E) much hotter and much denser than its surface.
The linear density of a rod, in g/m, is given by 
. The rod extends from the origin to x = 0.400 m. What is the location of the center of mass of the rod?
A. x = 0.213 m B. x = 0.315 m C. x = 0.384 m D. x = 0.184 m E. x = 0.208 m
How can we see through the dusty plane of the Milky Way disk in order to study star formation?
a) Use the radial velocity technique. b) Look at visible radiation from space with the Hubble Space Telescope. c) Use an optical telescope from the ground with a higher angular resolution. d) Look at infrared radiation with the Spitzer Space Telescope. e) Obtain a rotation curve using the gas in the Milky Way disk.