A 340-hertz sound wave travels at 340 m/s in air with a wavelength of
A) 1 m.
B) 10 m.
C) 100 m.
D) 1000 m.
E) none of the above
Answer: A
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When a 20.8-? resistor is connected across a 15.6-V battery, a current of 500 mA flows. What is the internal resistance of the battery?
a. 20.8 ? b. 10.4 ? c. 31.2 ? d. 0.732 ? e. 1.25 ?
A wheel rotating about a fixed axis with a constant angular acceleration of 2.0 rad/s2 starts from rest at t = 0 . The wheel has a diameter of 20 cm. What is the magnitude of the total linear acceleration of a point on the outer edge of the wheel at t = 0.60 s?
a. 0.25 m/s2 b. 0.50 m/s2 c. 0.14 m/s2 d. 0.34 m/s2 e. 0.20 m/s2
The density of copper at 
and its linear expansion coefficient is 
Consider a hot cube of copper that is 1.0cm on a side when its temperature is 1356 K. What is the cube’s mass?
A. 8.80 g B. 8.46 g C. 8.78 g D. 8.38 g E. 8.94 g
The quantum mechanical model of the hydrogen atom requires that if the orbital quantum number = 5, there will be how many permitted orbital magnetic quantum numbers allowed?
a. 7 c. 5 b. 15 d. 11