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Capacitors are used in many applications where one needs to supply a short burst of relatively large current. A 200.0 µF capacitor in an electronic flash lamp supplies a burst of current that
A 220-kg crate is pushed horizontally with a force of 715 N. If the coefficient of friction is 0.20, calculate the acceleration of the crate.
What force must be applied to push a carton weighing 240 N up a 19° incline, if the coefficient of kinetic friction is 0.41? Assume the force is applied parallel to the incline and the velocity
The right-hand wire carries a current of 3 A out of the paper. the permeability of free space 4pi x 10^-7 N/A^2 what is the magnitude of the force between these two wires.
A canoe has a velocity of 0.310 southeast relative to the earth. The canoe is on a river that is flowing at 0.520 east relative to the earth. I found that the velocity of the canoe relative to the
Can a ball that bounces up and down without a loss in kinetic energy which reaches a constant height at regular intervals be said to exhibit simple harmonic motion? If yes, how? Can a formula be de
A small motor runs a lift that raises a load of bricks weighing 790 N to a height of 13 m in 25 s. Assuming that the bricks are lifted with constant speed, what is the minimum power the motor must p
A 1.04 kg mass is attached to a spring of force constant 10.9 N/cm and placed on a frictionless surface. By how much will the spring stretch if the mass moves along a circular path of radius 0.495
You raise a bucket of water from the bottom of a deep well. If your power output is 119 W, and the mass of the bucket and the water in it is 4.00 kg, with what speed can you raise the bucket? Ignor
A backpack full of books weighing 53.0 rests on a table in a physics laboratory classroom. A spring with a force constant of 140 is attached to the backpack and pulled horizontally. If the backpack
The current in the short coil is increased at a constant rate from zero to i = 2.47 A in a time of t = 13.00 s. Calculate the induced potential difference in the long solenoid while the current is i
An astronaut is rotated in a horizontal centrifuge at a radius of 3.3 m. (a) What is the astronaut's speed if the centripetal acceleration has a magnitude of 6.4g? (b) How many revolutions per minu
Then the bar is dropped. What is the terminal speed at which the bar falls? Assume the bar remains horizontal and in contact with the rods at all times.
A uniformly charged insulating rod of length 10 cm is bent into a shape of a quarter circle. The rod has a total charge of +7.5 C. Find the:
A skier is gliding along at 3.14m/s on horizontal, frictionless snow. He suddenly starts down a 20.2deg incline. His speed at the bottom is 24.6m/s. What is the length of the incline?
A chair of weight 10.0 kg lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 35.0 N directed at an angle of 39.0 below the horizontal and the chair
Two speedboats (A & B) travel around a curve whose radius is 295 meters. If the centripetal acceleration of speedboat A is 2 times the centripetal acceleration of speedboat B, what is the ratio
A 228 kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 29.0° with respect to the horizontal. The coefficient of kinetic frictio
A car can decelerate at -4.60 m/s2 without skidding when coming to rest on a level road. What would be the magnitude of its deceleration if the road were inclined at 15° uphill? Assume the same
A 4.10 kg block is pushed along a floor by a constant applied force that is horizontal and has a magnitude of 40.0 N. Figure 6-30 gives the block's speed v versus time t as the block moves along an
An airplane must reach a speed of 192 mi/h to take off. If the runway is 460 m long, what is the minimum value of the acceleration that will allow the airplane to take off successfully?
A catapult launches a rock at a 48° angle with respect to the horizontal. Find the maximum height attained if the speed of the rock at its highest point is 30.1 m/s.
Find the change in the magnetic flux through the coil when the current in the solenoid increases to 8 A in a period of 1.11 s. The permeability of a vacuum is 4 × 10-7 T · m/A
The driver of a 1710 car traveling on a horizontal road at 112 suddenly applies the brakes. Due to a slippery pavement, the friction of the road on the tires of the car, which is what slows down th
The block drops 0.179 m before momentarily coming to rest, after which it moves back upward. (a) What is the spring constant of the spring? (b) Find the angular frequency of the block's vibrations.