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A wide solenoid with 7500 turns of wire is 50 cm long with its main axis aligned along the vertical direction. The current in the solenoid is initially 2 A and is circling counter-clockwise as viewed from above.
a) What is the magnetic field, both magnitude and direction inside the solenoid?
b) The magnetic field strength inside the solenoid increases to 2.5T in 2.0 seconds. What is the new current in the solenoid?
c) Inside the larger solenoid is a smaller coil with 40 turns, radius 2.0 cm, and resistance of 20 ohms. Find the magnitide and direction of the induced current in the smaller coil caused by the changing flux.
In a time of T seconds, a motorcycle can accelerate from rest to the speed v. Calculate the speed of the motorcycle (in terms of v) 7T after starting
The slope of a line connecting two points on a velocity versus time graph gives A) instantaneous velocity. B) average velocity. C) instantaneous acceleration. D) average acceleration. I know that its acceleration.. so C or D. Dont know the difference..
A parallel-plate air capacitor is made by using two plates 19 cm square, spaced 3.5 mm apart. It is connected to a 3-V battery. What is the electric field between the plates
Temperatures are often measured with electrical resistancethermometers made of platinum wire. What is the temperature of the boiling chlorine
A bat hits a moving baseball. If the bat delivers a neteastward impulse of 1.3 N-s and the ball starts with an initialhorizontal velocity of 3.8 m/s to the west, what is the mass of the ball
Big yellow fishing swimming at 2.0m/s swallows little green fish at rest. What fraction of big yellow fish's initial kinetic energy was lost is this collision
The parachute on a race car of weight 8940 N opens at the end of a quarter mile run when the car is traveling at 38.0 m/s. What total retarding force must be supplied
A computer to be used in a satellite must be able to withstand accelerations of up to 27 times the acceleration due to gravity. What is the minimum amplitude of vibration that must be used in this test
A rod is measured to be 15 cm by an observer moving at 0.80c with respect to the length of the rod. What is the proper length of the rod
A man stands on a platform that is rotating (without friction) with an angular speed of 0.361 rev/s; his arms are outstretched, what is the resulting angular speed of the platform
A 21.0-kg box rests on a frictionless ramp with a 14.3° slope. The mover pulls on a rope attached to the box to pull it up the incline. If the rope makes an angle of 38.4° with the horizontal, what is the smallest force F the mover will have to exert..
in gaseous sodium chloride chloride ions have one more electron than they have protons and sodium ions have one more
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