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Physics, 23.06.2019 14:30
Multiple choice. choose the one alternative that best completes the statement or answers the question. 1) if the force on an object is in the negative direction, the work it does on the object must be 1) a) negative. b) positive. c) the work could be either positive or negative, depending on the direction the object moves. 2) a truck has four times the mass of a car and is moving with twice the speed of the car. if kt and kc refer to the kinetic energies of truck and car respectively, it is correct to say that 2) a) kt = 16kc . b) kt = 1 2 kc. c) kt = kc . d) kt = 2kc . e) kt = 4kc . 3) you and your friend, who weighs the same as you, want to go to the top of the eiffel tower. your friend takes the elevator straight up. you decide to walk up the spiral stairway, taking longer to do so. compare the gravitational
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Physics, 23.06.2019 23:30
The first step in cloud formation a) warmed air cools and condenses. b) solar energy causes warm air to rise. c) solar energy causes water vapor to condense.
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Physics, 24.06.2019 00:00
The pin is made of a material having a failure shear stress of τfail = 130 mpa . part a determine the minimum required diameter of the pin to the nearest mm. apply a factor of safety of f.s. = 2.5 against shear failure.
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