Which spacecraft did NOT visit Saturn?
A. Pioneer
B. Voyager 2
C. mariner 10
D. Galileo
Ans: C. mariner 10
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Consider a conducting bar that is free to slide along conducting rails in an upward magnetic field as shown in the diagram below. If we connect the rails to the battery shown, which way will the bar be pushed?
A.A
B.B
C.C
D.D
E. Down into the rails
F. Up off the rails
Suppose that Mars had a higher surface temperature. How would its spectrum be different?
A. The peak in the infrared would be at shorter wavelength. B. It would reflect more of the Sun's red light C. The peak in the infrared would be at longer wavelength. D. It would reflect more of the Sun's blue light.
Which of the following has the greater weight?
1) 1 kilogram of gold 2) 1 kilogram of feathers 3) both weigh the same in the same locality This follows from the fact that 4) gold is more compact than feathers. 5) weight and mass are directly proportional to each other.
Three particles are placed in the xy plane. A 30-g particle is located at (3, 4) m, and a 40-g particle is located at (?2, ?2) m. Where must a 20-g particle be placed so that the center of mass of the three-particle system is at the origin?
a. (?3, ?1) m b. (+1, +3) m c. (+3, ?1) m d. (?1, ?3) m e. (?0.5, ?2) m