Physics, 12.10.2020 07:01, JamesLachoneus
How does the force of gravity pulling a box down a slope change if the slope becomes steeper? (Like tilting a board up with something resting on it.) Please explain it to the best of your ability and show a free body diagram showing all the forces acting on the box.
Answers: 2
Physics, 21.06.2019 23:00, blackwell0315
1point) a skydiver weighing 130 lb (including equipment) falls vertically downward from an altitude of 14,000 ft and opens the parachute after 20 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.85|v|0.85|v| when the parachute is closed and is of magnitude 17|v|17|v| when the parachute is open, where the velocity vv is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. find the speed of the skydiver when the parachute opens. speed is 150.6121788 ft/s find the skydiver's height when the parachute opens. height is 2338.98591 ft find the limiting velocity vlvl after the parachute opens. (think about whether this should be positive or negative.) vl=vl= 7.647 ft/s
Answers: 2
Physics, 22.06.2019 02:30, 22emilyl530
Agas contained within a piston-cylinder assembly undergoes three processes in series: process 1ļ 2: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 2ļ 3: constant pressure expansion to 1 liter. process 3ļ 1: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat
Answers: 2
Physics, 22.06.2019 09:00, cmflores3245
Sobre transformaƧƵes cĆclicas, sĆ£o feitas algumas afirmaƧƵes, determine quais estĆ£o corretas. i ā a variaĆ§Ć£o de energia interna em uma transformaĆ§Ć£o cĆclica Ć© nula; ii ā o trabalho, em uma transformaĆ§Ć£o cĆclica, Ć© sempre positivo; iii ā ao completar um ciclo, o gĆ”s tem a mesma temperatura com a qual comeƧou a transformaĆ§Ć£o; iv ā uma transformaĆ§Ć£o cĆclica Ć©, obrigatoriamente, composta de transformaƧƵes conhecidas, como adiabĆ”tica, isocĆ³rica, etc: a) i e iii b) i e ii c) ii e iii d) i e iv e) iii e iv
Answers: 1
How does the force of gravity pulling a box down a slope change if the slope becomes steeper? (Like...
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