Physics, 28.02.2020 00:56, TanishaSchollaert1
Which of the following correctly describes the hierarchy that exists in the universe? (3 points)
A galaxy refers to all existing matter, energy, and space that is held together by gravity.
A galaxy is a collection of planets, their moons, and other objects in orbit around a central star.
A solar system refers to all existing matter, energy, and space that is held together by gravity.
A solar system is a collection of planets, their moons, and other objects in orbit around a central star.
Answers: 3
Physics, 22.06.2019 05:20, lea5261
Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.
Answers: 2
Physics, 22.06.2019 18:50, jtsizemore
An insulated thermos contains 148 g of water at 72.7 ˚c. you put in a 11.7 g ice cube at 0.00 ˚c to form a system of ice + original water. the specific heat of liquid water is 4190 j/kg•k; and the heat of fusion of water is 333 kj/kg. what is the net entropy change of the system from then until the system reaches the final (equilibrium) temperature?
Answers: 2
Which of the following correctly describes the hierarchy that exists in the universe? (3 points)
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