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A very long solenoid of circular cross section with radius R = 4.0 cm, is centered on, and has its length parallel to, the z axis. It has 85.0 turns per centimeter. A proton is sitting just outside the solenoid on the x axis, at x = +4.50cm. The current in the solenoid is turned on and ramped up at a rate of 43.0 A/s, so that the magnetic field points in the +z direction. The +x axis points to the right, the +y axis points towards the top, and the +z axis points out of the page.
What direction is the force on the proton? The magnitude is 1.31*10^(-21) N. The answer is in the -y direction, but I am wondering why!
In the Bohr model of the hydrogen atom, an electron (mass m=9.1×10?31kg) orbits a proton at a distance of 5.3×10?11m. How many revolutions per second does the electron make
A man of mass 65 kg falls stiff-legged straight down from a height of 2m. He lands on one foot. The femur is a bone in the leg with the length L=.65m, and a cross-sectional area of about 2.0 x 10^-4m^2. The Young's modulus for bone is 9.4x 10^9 N/..
A 1000-kg car travelling at a speed of 32 m/s skids to a halt on wet concrete where f_k = 0.3. How long are the skid marks.
question1the sound level measured in a room by a person watching a movie on a home theatre system varies from 65 db
A hoop and a disk, both of 0.68- m radius and 4.0- kg mass, are released from the top of an inclined plane 2.6 m high and 7.7 m long. What is the speed of the disk
q1. what is the frequency of ultrasound in a medium if he wave length is 3.0 x 10-3 m and velocity is 1300 mmms?q2. an
A car traveling at a constant speed of 27.0 m/s passes a trooper hidden behind a billboard. From the intersection of the two curves, read the time at which the trooper overtakes the car
A father pulls his young daughter on a sled with a constant velocity on a level surface a distance of 10 m. how much work does the father do
q1. a hotel elevator ascends 170 m with a maximum speed of 5.9 ms. its acceleration and deceleration both have the
14 electrons are placed on a metal sphere. if the potential of the sphere is -38 V, what is the radius?
Suppose the uranium nucleus was at rest just before the decay. If the α particle is emitted at a speed of 1.74×107 m/s, illustrate what would be the recoil speed of the thorium nucleus?
A spring with spring constant 13 N/m hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. It is then pulled down 8.5cm and free. The ball makes 26 oscillations in 18 s seconds.
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