Order the following from most to least dense:
a. black hole, neutron star, white dwarf b. white dwarf, neutron star, black hole
c. black hole, white dwarf, neutron star d. neutron star, white dwarf, black hole
a
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An object hits a wall and bounces back with half of its original speed. What is the ratio of the final kinetic energy to the initial kinetic energy?
A) 1/2 B) 1/4 C) 2 D) 4 E) 8
Three masses are located as follows: a 3.0-kg mass is at the origin, a 4.5-kg mass at (0.0 m, 4.0 m), and a 2.5-kg mass at (3.0 m, 0.0 m). What is the gravitational energy of the system of masses? G = 6.67 x 10-11 N•m2/kg2
A) -3.8 × 10-10 J B) -3.9 × 10-10 J C) -5.4 × 10-10 J D) -3.2 × 10-10 J E) -3.5 × 10-10 J
A(n) ____________________ is used to measure the brightness and color of stars
Fill in the blank(s) with correct word
Energy and Momentum: Two objects of different mass have equal, non-zero kinetic energies. Which object has the greater magnitude momentum?
A. the heavier object B. the lighter object C. They both have the same magnitude momentum.