A rabbit trying to escape a fox runs north for 8.0 m, darts northwest for 1.0 m, then drops 1.0 m down a hole into its burrow. What is the magnitude of the net displacement of the rabbit?
A) 8.8 m
B) 8.1 m
C) 66 m
D) 10 m
A
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Which statement best describes the surface of Ganymede?
a. dark and dirty ice, heavily pocked with craters b. old and dark on some portion, but cratered with a young bright grooved terrain c. icy crust free of craters with a liquid water ocean beneath d. covered in active sulfur-based volcanoes e. mostly water ice mixed with methane
Significant Figures: In a parallel universe, the quantity ? has the value 3.14049… . Express ? in that universe to(a) four significant figures(b) five significant figures.
Fill in the blank(s) with the appropriate word(s).
Suppose we know a particle’s four-momentum pt and px components. If we draw the particle’s four-momentum arrow on an energy–momentum diagram, we can use a hyperbola to determine
A. The particle’s energy.
B. The particle’s speed.
C. The particle’s x-velocity.
D. The particle’s momentum magnitude 
.
E. The particle’s mass.
F. The scaling on the t axis.
T. Something else (specify).
In using a long steel rod as a lever to move a large rock, where should the fulcrum be placed for a person to use the least amount of force to move the rock?
A. Anywhere in between; it makes no difference B. Close to the rock C. Close to the person D. Exactly halfway between the person and the rock