The mass of the Earth is 81 times the mass of the Moon, and the radius of the Earth is 3.7 times of the Moon. If the acceleration of free fall on the Earth is 9.81 ms, without using the actual mass and radius of Earth and Moon, determine the acceleration on the Moon? ​

What was the approximate temperature of the universe at an age of 1015 s?

As part of an outdoor display, a 5-kg model c of the earth is attached to wires ac and bc and revolves at a constant speed v in the horizontal circle shown. determine the range of the allowable values of v if both wires are to remain taut and if the tension in either of the wires is not to exceed 116 n. given: r = 0.905 m.

During this chemical reaction energy is released. in the chemistry lab, this would be indicated by an increase in temperature or, if the reaction took place in a test tube, the test tube would feel warmer to the touch. reactions like this release energy because a) the reaction requires activation energy. b) the reactants have less potential energy than the products. c) the reactants have more potential energy than the products. d) the mass of the products is greater than the mass of the reactants.