Physics, 20.02.2020 17:27 starsinopoli13
You throw a rock straight up from the edge of a cliff. It leaves your hand at time tt = 0 moving at 12.0 m/sm/s. Air resistance can be neglected. Find both times at which the rock is 4.00 mm above where it left your hand.
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If we compare the force of gravity to strong nuclear force, we could conclude that
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Acarpenter is driving a 15.0-g steel nail into a board. his 1.00-kg hammer is moving at 8.50 m/s when it strikes the nail. half of the kinetic energy of the hammer is transformed into heat in the nail and does not flow out of the nail. what is the increase in temperature of the nail after the three blows that the carpenter needs to drive the nail in completely? the specific heat of steel is 448 j/kg ∙ k. a) 2.7 k b) 1.8 k c) 7.7 k d) 8.1 k e) 3.6 k
Answers: 1
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