A particle whose charge has the specified sign enters a region of space where the magnetic field has the direction shown. What is the initial direction of the magnetic force acting on the particle in each case?
A. Forward
B. Backward
C. Rightward
D. Leftward
E. Into the paper
F. Out of the paper
T. (Zero force)
E. Into the paper
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Wien's Law: What is the frequency of the most intense radiation from an object with temperature 100°C? The constant in Wien's law is 0.0029 m ? K. (c = 3.0 × 108 m/s)
A. 2.9 × 10-5 Hz B. 3.9 × 1013 Hz C. 1.0 × 1013 Hz D. 1.0 × 1011 Hz
Refracting Telescope: A student constructs an astronomical telescope with a magnification of 10. If the telescope has an objective lens of focal length 0.50 m, what is the resulting length of the telescope?
A. 53 cm B. 55 cm C. 60 cm D. 75 cm
To be dimensionally consistent, velocity [L/T], force 
mass [M], and length [L] must be related as follows.
A. 
B. 
C. 
D. velocity = force length/mass
A mirror with a focal length 100 cm has a 4.0 cm object placed 20 cm in front of it. What is the position of the image?
A) 25 cm behind the mirror B) 100 cm in front of the mirror C) 20 cm in front of the mirror D) 20 cm behind the mirror E) 25 cm in front of the mirror