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The electric motor of a model train accelerates the train from rest to 0.600m/s in 18ms. The total mass of the train is 515g. Find the average power delivered to the train during its acceleration.
You measure an electric field of 1.32*10^6 N/C at a distance of 0.156m from a point charge. What is the magnitude of the charge
At a factory, a noon whistle is sounding with a frequency of 480-Hz. As a car travelling at 79 km/h approaches the factory, the driver hears the whistle at frequency fi. After driving past the factory.
The larger the mass of a star, the shorter its Main Sequence lifetime becomes. Estimat the Main Sequence lifetime of a star with a mass of 6 Msolar
A coin slides over a frictionless plane and across an xy coordinate system from the origin to a point with xy coordinates, How much work is done by the force on the coin during the displacement
A helium-neon laser emits light of wavelength 632.8 nm and has a power output of 4.0 mW. How many photons are emitted per second by this laser
a thin, uniform bar of length D = 1.28 m and mass M = 0.67 kg pivoted at the top. find the speed of the particle before impact
At an outdoor market, a bunch of bananas attached to the bottom of a vertical spring of force constant 16.0 N/m is set into oscillatory motion with an amplitude of 20.0 cm. What is the weight of the bananas in newtons
In a serve, a tennis player hits the ball horizontally. Neglect the effects of air resistance and the diameter of the ball. Where will the ball land if it just clears the net
A trough is 5 feet long and 1 foot high. The vertical cross-section of the trough parallel to an end is shaped like the graph of y=x10 from x=1 to x=1. The trough is full of water. Find out the amount of work in foot-pounds required to empty the t..
The plates of a parallel-plate capacitor each have an area of 0.1 m2 and are separated by a 1 mm thick layer of paper. Find the electric field between the plates
A proton, which is the nucleus of a hydrogen atom, can be modeled as a sphere with a diameter of 2.4 fm, what is the density of the proton
An equipotential line surrounds a charge distribution of known value (35 mC). Two points A and B are selected on this equipotential line separated by 3.0 cm. What is the potential difference DV between these points
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