Just above the surface of the earth, the direction of the gravitational field is away from the earth
Indicate whether the statement is true or false
F
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How does Earth's varying distance from the Sun affect our seasons?
A) It doesn't—Earth's orbital distance plays no significant role in the seasons.
B) It causes the seasons to be more extreme than they would be if the Earth's distance from the Sun were always the same.
C) It makes summer warmer in the Northern Hemisphere than in the Southern Hemisphere.
D) It is responsible for the fact that the seasons are opposite in the Northern and Southern hemispheres.
Consider an X-ray binary system in which a compact object, surrounded by an accretion disk, is in a binary orbit with another star. All of the following statements about such accretion disks are true except:
A) The radiation from an accretion disk may vary rapidly in time. B) The compact object may be either a neutron star or a black hole. C) X-rays are emitted by the hot gas in the accretion disk. D) Several examples of flattened accretion disks being "fed" by a large companion star can be seen clearly in photos from the Hubble Space Telescope. E) The accretion disk consists of material that spills off the companion star.
Which statement is incorrect? The gravitational force on an orbiting satellite due to the Earth
a. aims toward the center of the Earth. b. depends on the Earth's mass. c. depends on the satellite's mass. d. depends on the distance between the Earth and the satellite. e. none of the above
A 1.00-kg mass is attached to a spring hanging vertically and hangs at rest in the equilibrium position. The spring constant of the spring is 1.00 N/cm. The mass is pulled downward 2.00 cm and released
What is the speed of the mass when it is 1.00 cm above the point from which it was released? A) 0.0443 m/s B) 1.67 m/s C) 0.0201 m/s D) 1.73 m/s E) The mass will not reach the height specified.