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How much work is done by the motor when the position of the arm is moved from x = 0.200 m to x = 0.750 m? If the work is done in 4.50 s, what is the power of the motor in W?
The plates of a parallel-plate capacitor have a separation of 4.04mm , and each has an area of 15.4cm2 . Each plate carries a charge of magnitude 6.65×10?8C, What is the potential difference between the plates
A ball is thrown upward with an initial velocity of 12.0 m/s at an angle of 50.0 deg above the horizontal. find the ball's greatest height above the ground
The electric motor of a model train accelerates the train from rest to 0.820 m/s in 18.5 ms. The total mass of the train is 875 g. Find the average power delivered to the train during the acceleration
Suppose that a person pushes a box with a constant force of 100 N over a distance of 25 meters. What is the change in kinetic energy
When some stars use up their fuel, they undergo a catastrophic explosion called a supernova. This explosion blows much or all of a star's mass outward, in the form of a rapidly expanding spherical shell.
A 50g hard-boiled egg oscillates on a spring with force constant 25N/m. A damping force F=-bv acts on the egg. Calculate the magnitude of the damping constant b
White light containing wavelengths from 405 nm to 760 nm falls on a grating with 8000 lines/cm. How wide is the first-order spectrum on a screen 2.20m away.
Consider a spherical Gaussian surface and three charges: q1 = 1.62?C , q2 = -2.45?C , and q3 = 3.57?C . Find the electric flux through the Gaussian surface
A ranger in a national park is driving at 44 km/h when a deer jumps onto the road 70 m ahead of the vehicle. After a reaction time of t s, the ranger applies the brakes to produce an acceleration of -3.00 m/s2.
You drive your 1,345-kg car at a constant speed of 23 mph a distance of 71 m down a ramp that has a grade of 14 %. Define positive direction in the forward direction
Two plane mirrors stand facing each other, 2.79 m apart, and a woman stands between them. What is the position of the third closest image
A ball is dropped from a boat so that it striks the surface of a lake iwth a speed of 16.5 ft/s. Ball experiences aceeleration a = 10 - .8v, Determin the depth of the lake
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