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A Carnot heat engine takes 89 cycles to lift a 15 kg mass a height of 15 m. The engine exhausts 16J of heat per cycle to a cold reservoir at 0 degrees C. What is the temperature of the hot reservoir in Celsius.
At which angle will the photon scatter with respect to its original direction? (The accepted unit abbreviations for angles are either 'deg' for degrees or 'rad' for radians.)
If the charge of the point charge in the figure were -2Q (instead of +Q), by what factor would the magnitude of the force on the point charge due to the dipole change.
Jim is speeding toward James Island with a speed v = 22 m/s when he sees Betsy standing on shore at the base of a cliff. Jim sounds his f = 365-Hz horn. What frequency does Betsy hear
Laser light of intensity 1.5 W/m2, polarized so that its electric field vector makes an angle 45o with the x-axis, What would the intensity of the transmitted light be if the second transmission axis were perpendicular to the initial polarization
A boat crosses a river with constant velocity with respect to the water, v=0.3 m/s. The boat%u2019s velocity is directed perpendicular to the shores of the river. Find the drift s of the boat along the river when it reaches the opposite shore
A 2.0 mm diameter plastic bead is charged to - 1.0nC. A proton is fired at the bead from far away with a speed of 1.0x10^6 m/s, What is the impact speed
A 35.0 cm violin string with linear density 0.66 g/m is placed near a loudspeaker that is fed by an audio-oscillator of variable frequency. What is the tension (in newtons) in the string
a uniform 12.0kg ladder is 4.0m long and is placed against a frictionless wall at 30 degress. find the frictionless force at the floor necessary to maintaain equilibrium
A 1000-kilogram race car is traveling at 60 m/s around a curved section of track that has a radius of 300 m. What is the car's centripetal acceleration? What is the centripetal force that acts on the car?
A machine shop grinding wheel accelerates from rest with a constant angular acceleration of 2.3 rad/s^2 for 7.1 s, Find the total number of revolutions turned
q1. a 52.0 skateboarder wants to just make it to the upper edge of a quarter pipe a track that is one-quarter of a
A ray of sunshine is passing from diamond into crown glass; the angle of incidence is 35.00 degrees. Determine the angle between the refracted blue and red rays
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