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Suppose a heat engine has an efficiency of 0.248 and produces 1.88×10^4 J of work.
How much energy is pulled in from the hot reservoir?
How much energy is rejected by the engine? (This energy is "exhausted" to the cold reservoir.))
Two blocks with different mass are attached to either end of a light rope that passes over a light, frictionless pulley that is suspended from the ceiling. what is the mass of each block
Thor throws his war hammer at an 1800 kg car initially at rest and it becomes embedded within it. with what speed do the car and hammer move just after the collision
A uniform magnetic field B is confined to the square region with side of length 2L.
A resistor of unknown resistance and a 48.0-? resistor are connected across a 128.0-V emf device in such a way that an 10.0-A current flows
A sled weighs 100N. It is held in place on a frictionless 20 degrees slope by a rope attached to a stake at the top, the rope is parallel to the slope. What is the normal force of slope acting on the sled.
A 5 kg block, measuring 10 cm per side, is held 50% submerged in water by a helium balloon. what is the diameter of the balloon
A very small call (m = 4 gms) hangs on a thread at an angle of ? = 30o. What is the strength of the electric field
Light of wavelength 619 nm is incident normally on a diffraction grating. Two adjacent maxima occur at angles given by sin ? = 0.20 and sin ? = 0.32. The fourth-order maxima are missing, What is the separation between adjacent slits
An RL circuit has a 5 k resistor and a 1mH inductor. This circuit is driven by a 100 Hz sine wave with 1V amplitude. What is the amplitude of the current in the circuit
In a tornado or hurricane, a roof may tear away from the house because of a difference in pressure between the air inside and the air outside. What is the magnitude of the force on the roof
Where does the energy of an objects inertia come from. You can throw a ball, And how is the ball interacting with the space around it to be moving in the first place?
A girl is using a rope to pull a box that weight 300 N across a level surface with constant velocity. what is the normal force of the floor on the box
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