Our best close-up views of the jovian moons came from the many passes by:
A) Voyager 2.
B) Galileo.
C) Cassini.
D) New Horizons.
E) Global Surveyor.
B
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A mass 
is connected by a light string that passes over a pulley of mass M to a mass 
sliding on a frictionless horizontal surface as shown in the figure. There is no slippage between the string and the pulley. The pulley has a radius of 25.0 cm and a moment of inertia of 1?2 
If 
is 1.00 kg, m2 is 2.00 kg, and M is 4.00 kg, then what is the tension in the string attached to 
?
A. 6.83 N
B. 7.03 N
C. 7.84 N
D. 8.02 N
E. 8.33 N
Heat transfer that involves mass movement is
a. temperature. b. conduction. c. convection. d. radiation.
The principal advantage of ac power over dc power is that
A) more energy is dissipated during transmission. B) ac voltage oscillates while dc voltage does not. C) ac voltage can be transformed via conventional transformers. D) ac circuits multiply power more easily. E) ac circuits are safer.
The isotope 64Zn has a nuclear radius of 4.8 ×10-15 m. Which of the following is the mass number of an isotope for which the nuclear radius is 6.8 ×10-15 m?
a. 182 c. 145 b. 125 d. 96