How many forces act on an upwardly tossed coin when it gets to the top of its path?
A) one; the force due to gravity
B) two; gravity and the force in the coin itself
C) three; gravity, the coin's internal force, and a turnaround force
D) none of the above
Answer: A
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An organ pipe closed at one end has a length of 60 centimeters. What is the wavelength of the second harmonic?
A. 20 cm B. 60 cm C. 80 cm D. 100 cm
A long linear charge distribution of charge density 1.35 nC/m is surrounded by a concentric cylindrical surface of length 1.60 m and radius 23.6 cm. What is the electric flux through the surface of the cylinder?
A. 0.00
B. 160 
C. 244
D. 280
E. 316
A total impedance of an RC circuit with a capacitance of 40.0 ?F is 800 ?. If the frequency of the applied ac voltage is 18.0 Hz, what is the resistance of the circuit?
A) 569 ? B) 669 ? C) 769 ? D) 869 ? E) 800 ?
Which type of heavy atomic nuclei are most common, and why?
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