The innermost satellite of Jupiter orbits the planet with a radius of 422 × 103 km and a period of 1.77 days. What is the mass of Jupiter? (G = 6.67 × 10-11 N ? m2/kg2)
A) 1.33 × 1027 kg
B) 1.50 × 1027 kg
C) 1.72 × 1027 kg
D) 1.89 × 1027 kg
E) 3.08 × 1027 kg
D
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Centrifuge separation, a method of separating 235U from 238U, works because of
A) the difference in size of the two nuclei. B) the fact that both these nuclei are radioactive. C) the difference in the masses of the two nuclei. D) the difference in electrical charge of the two nuclei. E) the fact that both these nuclei respond to (or feel) the strong nuclear force.
Which of the following best describes the image from a plane mirror?
a. virtual and magnification greater than one b. real and magnification less than one c. virtual and magnification equal to one d. real and magnification equal to one
Which of the following is a conservative force? (All refer to a car on a slope.)
a. The force you exert on the car pushing it uphill. b. The force exerted by rain drops falling on the car. c. The frictional force of the road on the car. d. The gravitational force acting on the car. e. The force you exert on the car (pushing it uphill) after it starts to slide downhill.
A rubber rod is rubbed with fur, so that the fur becomes positive. The rod is then used to charge an electroscope. The charge on the electroscope will be
A. neutral. B. negative if charged by induction. C. positive if charged by induction. D. negative if charged by polarization. E. positive if charged by contact.