One hemisphere of Enceladus may have the youngest surface of any of the jovian moons, with volcanoes spewing "ash" and "lava flows" of ________
Fill in the blank(s) with correct word
water
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Shown below are the four terrestrial planets of our solar system. Assume that all the planets started out equally hot inside. Rank the planets based on their expected cooling rates, from fastest cooling to slowest cooling.
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.
Approximately how long have cosmic microwave background photons been traveling through space?
A) 5000 years B) 380,000 years C) 14 billion years D) It depends on which direction they come from.
When dark energy is thrown into the mix, present observational data seem to indicate that the universe will ________
Fill in the blank(s) with correct word