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The current in a 80.0-mH inductor changes with time as I = 3.00t2 ? 7.00t, where I is in amperes and t is in seconds.
(a) Find the magnitude of the induced emf at t = 1.00 s.How does the emf of an inductor depend on the current? mV(b) Find the magnitude of the induced emf at t = 4.00 s.mV(c) At what time is the emf zero?
A typical car battery is composed of six, 2.1 V cells arranged in series to have an Emf of 12.6 V. How many electrons pass through the starter motor
A hollow plastic sphere is held below the surface of a freshwater lake by a cord anchored to the bottom of the lake. Calculate the buoyant force exerted by the water on the sphere
At one instant, a 0.26 kg particle is located at the position [r=(5.9m)*i+(5.5m)*j]. What is the angular momentum of the particle about the origin, in unit-vector notation
Which color light is the result of greater energy transition, red or blue, how much energy is needed to return an electron at ground level to the first quantum level? How can it be provided? Explain
A particular ideal solenoid has 1200 turns/m, a radius of 10 cm, and a current of 4.0 A. What is the maximum speed the electron can have if it is not run into the side of the solenoid
An electron traveling at v = 1.20 x 10^5 m/s passes from (2.00 m, 1.00 m, 3.00m) to (7.00 m, 3.00 m, 1.00 m), What is the force that electron experiences the instant
A lead block is suspended from the underside of a 0.8 kg block of wood of density of 720 kg/m3. what is the mass of the lead block
In a tug of war, each man o a 5-man team pulls with an average of 500N. What is the tension in the center of the rope
Suppose you have a spherical balloon filled with air at room teperature and 1.0 atm pressure; its raidus is 12cm. what's the balloon's new radius
A 128 carton is pulled up a frictionless baggage ramp inclined at 30.0 above the horizontal by a rope exerting a 72.60 pull parallel to the ramp's surface. If the carton travels 5.20 along the surface of the ramp, compute the work done on it by the r..
A golf club has a lightweight flexible shaft with a heavy block of wood or metal (called the head of the club) at the end. A golfer making a long shot off the tee uses a driver, What is the speed of the club head immediately after the collision
A rock climber throws a small first aid kit to another climber who is higher up the mountain. What is the vertical height between the two climbers
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