Which moon of the Jovian planets has a thick, hazy atmosphere?
a. Io
b. Triton
c. Europa
d. Titan
D
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Consider a uniform solid sphere of radius R and mass M rolling without slipping. Which form of its kinetic energy is larger, translational or rotational?
A) Its translational kinetic energy is larger than its rotational kinetic energy. B) Its rotational kinetic energy is larger than its translational kinetic energy. C) Both forms of energy are equal. D) You need to know the speed of the sphere to tell.
A 2.0-kg object moving 3.0 m/s strikes a 1.0-kg object initially at rest. Immediately after the collision, the 2.0-kg object has a velocity of 1.5 m/s directed 30° from its initial direction of motion. What is the y component of the velocity of the 1.0-kg object just after the collision?
a. ?3.7 m/s b. ?3.4 m/s c. ?1.5 m/s d. ?2.4 m/s e. ?4.1 m/s
Instructions: On occasion, the notation 
= [A, ?] will be a shorthand notation for 
.
Adding vectors 
and 
by the graphical method gives the same result for 
and 
. If both additions are done graphically from the same origin, the resultant is the vector that goes from the tail of the first vector to the tip of the second vector, i.e, it is represented by a diagonal of the parallelogram formed by showing both additions in the same figure. Note that a parallelogram has 2 diagonals. Keara says that the sum of two vectors by the parallelogram method is 
. Shamu says it is 
. Both used the parallelogram method, but one used the wrong diagonal. Which one of the vector pairs below contains the original two vectors?
A.
B.
C.
D.
E.
The image of a plant is 4.0 cm from a concave spherical mirror having a radius of curvature of 10 cm. Where is the plant relative to the mirror?
A) 4.4 cm in front of the mirror B) 9.0 cm in front of the mirror C) 1.0 cm in front of the mirror D) 2.2 cm in front of the mirror E) 20 cm in front of the mirror