Physics, 17.03.2021 23:40 ddswaggsoflyy3176
Everett and Aurora were helping Mrs. Moore move the large bookcase to the
right side of her classroom. Everett was pushing with 27 Newtons and Aurora
pulling with 19 Newtons. If the friction working against the moving bookcase v
12 N, how much is the net force being applied to the bookcase and in which
direction?
Answers: 2
Physics, 21.06.2019 23:30
What are chlorofluorocarbons and what impact do they have on the atmosphere?
Answers: 1
Physics, 21.06.2019 23:30
A175 g lump of molten lead at its melting point (327 c) is placed into 55.0 g of water at 20.0 c. the specific heat of lead is 130.j/kg c and the hf of lead is 20,400 j/kg. when the lead and the water have reached equilibrium, what is the temperature of the mixture?
Answers: 3
Physics, 22.06.2019 02:10
Astudent is performing an experiment comparing sound and light waves. the student gathers the following data. what conclusion does the student most likely make based on this data? light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. all sound waves always have the same energy, so the temperature of the medium does not affect wave speed. light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.
Answers: 3
Physics, 22.06.2019 07:50
Imagine you are standing in the antarctic during the southern hemisphere summer. the sky is clear and blue. there are no clouds in the sky. your shadow is cast on the icy ground. what is the color of the shadow?
Answers: 1
Everett and Aurora were helping Mrs. Moore move the large bookcase to the
right side of her classro...
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