An innocent mosquito is flying along the interstate and has a collision with a speeding semi. Which one experiences a greater change in momentum?
A. The mosquito
B. The semi
C. They both experience the same change in momentum
D. There is no change in momentum
C. They both experience the same change in momentum
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We know Mercury must have a large metal core because it has a high density
Indicate whether the statement is true or false
The buildup of thermal energy in a collapsing gas cloud leads to thermal pressure that can halt the gravitational collapse. What must happen for the gravitational collapse to continue?
A) The cloud must radiate away some of its thermal energy. B) The cloud must gain mass. C) The cloud must have a very strong magnetic field. D) The cloud must get a push from the radiation of nearby hot, young stars.
George Gamow, the creator of the Big-Bang theory of the origin of the universe, asks you to imagine what would happen if the speed of light was 15. mi/h
If you were on the sidewalk looking at a bicyclist ride down the street, how does she look to you while riding, compared to when she stops? A) taller, the same mass, but stretched out like a limousine B) shorter, the same mass, but stretched out like a limousine C) same height, greater mass, and flatter in the direction she is moving D) same height, smaller mass, and flatter in the direction she is moving E) shorter, greater mass, but stretched out like a limousine
Uranus completes one revolution about its own axis every 17.24 hours. What is the radius of the orbit required for a satellite to revolve about Uranus with the same period? Uranus has a mass of 8.69 × 1025 kg and G = 6.67 x 10-11 N•m2/kg2
A) 8.27 × 107 m B) 3.41 × 108 m C) 2.56 × 108 m D) 9.03 × 107 m E) 1.04 × 107 m