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We supply 132 J of heat to an engine with 11.2 % efficiency. (a) How much work (J) can the engine do? (b) How much heat (J) must the engine exhaust?
Suppose this rod can expand in sections like an umbrella shaft. Calculate the final angular speed if it expands in a totaly length of 2.0 m while rotating, assuming its angular momentum is conserved
An elevator of mass M2 has hanging from its ceiling (on a massless string) a mass M1. The elevator is being accelerated upward by a constant force F [F greater than (M1 + M2)g]. The mass M1 is initially a distance s above the elevator floor. Find ..
What is the total mass of the Earth's atmosphere? (The radius ofthe Earth is 6.37 multiplied by 106 m, and atmospheric pressureat the surface is 1.013 multiplied by 105 N/m2.)
Determine the number of moles of helium in the balloon and Determine the mass of helium needed to inflate the balloon to these values
What is the linear charge density together the arc.
an electron and a proton are each accelerated through a potential difference pf 10.0 million volts. Find the momentum ( in MeV/c) and the kinetic Energy ( in MeV) of each and compare with the results of using the classical Formular.
A lamp draws 0.50 A from a 120-V generator. How much power is delivered? How much energy does the lamp convert in 5.0 min?
A brick is initially 11.96 cm high and an aluminum can is initially 11.97 cm high. By how much must their temperatures be raised in order for the brick and the can to have exactly the same height?
A baseball is thrown from the roof of a 22.0m tall building with an initial velocity of magnitude 12.0 m/sec, What is the speed of the ball just before it strikes the ground? Use energy methods and ignore air resistance
A car is traveling east at 14m/s, weighing 2000kg. A car is traveling north at an unknown velocity, and weighs 1500 kg. What is the speed of the car traveling north
the two conducting rails in the drawing are tilted upward so they each make an angle of 30.0deg with respect to the
A hockey puck is swung at the end of a very slight 30 cm long string in a horizontal circle. what is the tension force supplied by the string
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