The low average densities of Jupiter and Saturn compared with Earth suggests ________.
A. they have no solid cores
B. heavier elements must be in gaseous form in their interiors
C. they are very hot
D. they are hollow
E. they contain large quantities of light elements, such as hydrogen and helium
Answer: E
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All the following types of objects are found almost exclusively in the disk (rather than the halo) of the Milky Way except
A) young stars. B) globular clusters. C) X-ray binaries. D) high-mass, red supergiant stars.
A car travels in a due northerly direction at a speed of 55 km/h. The traces of rain on the side windows of the car make an angle of 60 degrees with respect to the horizontal. If the rain is falling vertically with respect to the Earth, what is the speed of the rain with respect to the Earth?
A. 48 km/h B. 95 km/h C. 58 km/h D. 32 km/h E. 80 km/h
A split highway has a number of lanes for traffic. For traffic going in one direction, the radius for the inside of the curve is half the radius for the outside. One car, car A, travels on the inside while another car of equal mass, car B, travels at equal speed on the outside of the curve. Which statement about resultant forces on the cars is correct?
a. The force on A is half the force on B. b. The force on B is half the force on A. c. The force on A is four times the force on B. d. The force on B is four times the force on A. e. There is no net resultant force on either as long as they stay on the road while turning.
About what is the binding energy released in the fissioning of 236U?
A. 2.20 MeV B. 50.0 MeV C. 100 MeV D. 200 MeV E. 900 MeV