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Physics, 23.06.2019 00:20
An object with a mass of 1.5 kg changes its velocity from + 15 m/s to +22 m/s during a time interval of 3.5 seconds. what impulse was delivered to the objects?
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Physics, 23.06.2019 13:30
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
Physics, 24.06.2019 00:30
Anuclear power plant generates 3000 mw of heat energy from nuclear reactions in the reactor's core. this energy is used to boil water and produce high-pressure steam at 290 ∘c. the steam spins a turbine, which produces 1000 mw of electric power, then the steam is condensed and the water is cooled to 25∘c before starting the cycle again.
Answers: 1
Momentum is known as “mass in motion ” and is related to how much is required to an object’s
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