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1.) An 21-turn circular coil of radius 19.7 cm carries a current of 2.49 A. What is the strength of the magnetic field at a point on the coil\'s axis that is 41.1 cm from the center of the coil?
2.) A current of 7.03 A in a solenoid of length 10.8 cm creates a 0.313-T magnetic field at the center of the solenoid. How many turns does this solenoid contain?
3.) A doubly ionized molecule (i.e., a molecule lacking two electrons), moving in a magnetic field, experiences a magnetic force of 5.53 x 10-16 N as it moves at 309 m/s at 79.5° to the direction of the field. Find the magnitude of the magnetic field.
In western movies, the hero sometimes detects an approaching trainby "listening" to the railroad tracks. If the tracks are made ofsteel, how many times faster does sound travel in the tracks thanin air?
A hypothetical planet's radius is 5750 km and the mass is 5.00x1024 kg. What is the escape velocity on the hypothetical planet?
A baseball is confined between two thick walls a distance 0.5m apart. Calculate the zero point energy of the baseball
q1. a child goes down a playground slide with an acceleration of 1.20 ms2. compute the coefficient of kinetic friction
A 44 kilogram lady cheats on her diet and eats a 488-Calorie (488 kcal) jelly doughnut for breakfast. Determine how many stairs must the lady climb to perform an amount of mechanical work equivalent to the food energy in one jelly doughnut
an atom of mass m1 m moves in the positive x direction with speed v1 v. it collides with and sticks to an atom of
Identical point charges of +2.4 ?C are fixed to diagonally opposite corners of a square. A third charge is then fixed at the center of the square, Find the sign and magnitude of the third charge
A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 66.3° above the horizontal. By how much does the rocket clear the top of the wall
A 45-kg woman stands up in a 60-kg canoe 5.00 m long. She walks from a point 1.00 m from one end to a point 1.00 m from the other end. How far does the canoe move during this process
A certain substance has a mass per mole of 42 g/mol. When 313 Jis added as heat to a 25.0 g sample ofthis material, How many moles of the substance are present
In opening the door, a person pushes at a point on the door 65 cm from the hinges with a force of 50 N that is directed at an angle of 75 degree with respect to the surface of the door
Two steel wires of the same length, one with radius r and the other with radius 3r, are connected together, end to end, and tied to a wall. How far does the point where the two wires meet move
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