An electron is moving at 
m/s at an angle of 40 
to a 0.80 T magnetic field. What is the magnitude of the force on the electron?
A. 
B. 
C. 
D. 
E. 
C.
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If elements A and B chemically bond to each other more strongly than a random mixture of A and B elements chemically bond, it is expected that a _____________ of A and B should form.
Fill in the blank(s) with the appropriate word(s).
A point charge Q is placed on the x axis at x = 2.0 m. A second point charge, ?Q, is placed at x = 3.0 m. If Q = 40 ?C, what is the magnitude of the electrostatic force on a 30-?C charge placed at the origin?
a. 7.2 N b. 3.9 N c. 1.5 N d. 14 N e. 8.1 N
One mole of "o" gas is confined to volume V/2 by a thin membrane with another mole of "o" gas on the other side. Both gases are at the same temperature
A body of mass 5.0 kg is suspended by a spring which stretches 10 cm when the mass is attached. It is then displaced downward an additional 5.0 cm and released. Its position as a function of time is approximately
A. y = ?0.10 sin 9.9t. B. y = 0.10 cos 9.9t. C. y = ?0.10 cos (9.9t + 0.1). D. y = 0.10 sin (9.9t + 5). E. y = ?0.05 cos 9.9t.