At approximately what temperature can helium fusion occur?
A) 100 billion K
B) 10 million K
C) 100,000 K
D) 1 million K
E) 100 million K
E
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An induced emf is produced in
a. a closed loop of wire when it remains at rest in a nonuniform static magnetic field. b. a closed loop of wire when it remains at rest in a uniform static magnetic field. c. a closed loop of wire moving at constant velocity in a nonuniform static magnetic field. d. all of the above. e. only (b) and (c) above.
A 2.0-kg body moving along the x axis has a velocity vx = 5.0 m/s at x = 0. The only force acting on the object is given by Fx = (?4.0x) N, where x is in m. For what value of x will this object first come (momentarily) to rest?
a. 4.2 m b. 3.5 m c. 5.3 m d. 6.4 m e. 5.0 m
Physical Pendulum: A thin hoop is supported in a vertical plane by a nail. What should the radius of the hoop be in order for it to have a period of oscillation of 1.00 s? The moment of inertia of a hoop of mass M and radius R about a point on its rim is 2MR2.
A. 0.0154 m B. 0.0621 m C. 0.124 m D. 0.1876 m E. 0.248 m
Graphical Addition: Consider two vectors 
and 
shown in the figure. The difference 
- 
is best illustrated by
A. choice (a) B. choice (b) C. choice (c) D. choice (d)