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The electric motor of a model train accelerates the train from rest to 0.665 m/s in 25.0 milliseconds. The total mass of the train is 875 gram. Determine the average power delivered to the train during the acceleration.
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question a gass has 100 j of energy in the form of heat is transfered to a system and the system does 150 j of work
A soccer ball lying on the ground is kicked with an initial velocity of 10.0 m/s at an angle of 37 degrees above the horizontal
A train horn is heard at a 50 dB level by an observer 10 km away. What is the average power generated by the horn
If a nearsighted person has a far point df that is 3.50m from the eye, what is the focal length f1 of the contact lenses
two circular loops are centered on the x-axis parallel to the yz-plane. the smaller loop is stationary with radius r
A loop of wirein the plane of the floor has a clockwise current of 7.78A. The radius of the loop is 19.7cm. Use the Biot SavartLaw to calculate the magnetic field at the center of the loop. What is the directionof the magnetic field at the center? Ex..
a photo of a swing ride at an amusement park. The structure consists of a horizontal, rotating, circular platform of diameter D from which seats of mass m are suspended at the end of massless chains of length d. What is the speed of each seat
Two identical diverging lenses are separated by 23 cm. The focal length of each lens is -14 cm. find the final image distance relative to the lens on the right
The electric field between the plates of a paper-separated (K=3.75) capacitor is 8.19×104. determine the area of each plate
A vertical spring launches a 50 g ball upward. The spring constant is 12 N/m. The spring is initially compressed 5 cm. The spring is then released pushing the ball upward. Will the ball leave the spring?
A 68.0-O resistor is connected in series with a 76.0-µF capacitor and a generator having a maximum voltage of 1.20 102 V and operating at 60.0 Hz
A 0.93-µF capacitor is charged by a 37.0-V power supply. Find the maximum current in the resulting oscillations
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