Suppose you slowly, and at constant speed, lift a book weighing 12 N from the floor to a shelf 2 m above the floor. Neglect air resistance. The work done by you on the book is
A) 24 watts. B) 6 joules. C) 6 watts. D) 24 joules. E) zero.
D
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An ideal gas is at a temperature of 60
and a pressure of 1.50 atmospheres. What is the volume per particle of the gas?
a. 
b. 
c. 
d. 
e. 
How can we determine the reflectivity of an asteroid?
A) by comparing its brightness in visible light to its brightness in infrared light B) by taking a photograph of it C) by measuring its mass and radius D) by where it is located in the asteroid belt
A long straight wire (diameter = 2.0 mm) carries a current of 40 A. What is the magnitude of the magnetic field 1.5 mm from the axis of the wire?
a. 3.0 mT b. 12 mT c. 5.3 mT d. 7.4 mT e. 8.0 mT
A charged particle with mass m is suspended in the air by an upward-directed electric field E. What is the charge on the dust particle?
a. q = mgE b. q = mg/E c. q = E/mg d. q = Em/g