Physics, 05.10.2019 06:00 treavonknorton
Acar leaves the starting line at 20 m/s heading to the right at constant speed. a second car starts from rest accelerating at 2.0 m/s^2. how fast is the second car moving when it passes the first car? a) 25 m/s b) 30 m/s c) 35 m/s d ) 40 m/s e) 50 m/s
Answers: 3
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The metal wire in an incandescent lightbulb glows when the light is switched on and stops glowing when it is switched off. this simple process iswhich kind of a change? a.a physical changeb. a chemical changec. a nuclear changed. an ionic change
Answers: 1
Physics, 21.06.2019 20:30
Which statement best describes how private industry decides where to spend the money on research and development
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As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.
Answers: 1
Acar leaves the starting line at 20 m/s heading to the right at constant speed. a second car starts...
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