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An air-filled toroidal solenoid has a mean radius of 15.0 and a cross-sectional area of 5.02 (see the figure). The current flowing through it is 12.0 , and it is desired that the energy stored within the solenoid be at least 0.390 What is the least number of turns that the winding must have? Express your answer numerically, as a whole number, to three significant figures.
An 11g bullet is fired into an 11kg wood block that is at rest on the wood table. The block, with the bullet embedded, slides 5.11 across the table. The coefficient of kinetic friction for wood sliding on wood is 0.25.
A coil of 1800 turns has an induced voltage of 150 volt. Calculate the rate of flux change in Wb/s
In an electron microscope, there is an electron gun that contains two charged metallic plates 2.90 cm apart. Determine the acceleration of the electron
Consider the following vector fields: C=2x(x-direction), D=5x(y-direction), F=4s(phi-direction), G=3s(s-direction), For each field which could be magnetic, calculate the current density at the origin in two different ways
A sinusoidal electromagnetic wave having a magnetic field of amplitude 1.30?T and a wavelength of 434nm is traveling in the +xdirection, What is the amplitude of the associated electric field
A jeweler working with a heated 47 g gold ring should lower the ring's temperature to make it safe to handle. If the ring is initially at 99 degrees Celcius, what mass of water at 25 degrees Celcuis is needed to lower the ring's temperature to 38 ..
A loudspeaker in a parked car is producing sound whose frequency is 20680 Hz, what is the minimum speed of the moving car
Two charged spherical conductors are connected by a long conducting wire, and a charge of 15 μC is placed on the combina- tion. One sphere has a radius of 4.05cm and the other a radius of 6.05cm.
In the H atom the radius of orbit B is 16 times greater than the radius of orbit A. What is the total energy of the electron in orbit B
four charges are placed at the corners of a square of side 4 cm. What is the electrostatic potential energy of this system relative to infinity
A BB gun shoots pellets so that their velocity is given by v = (-5.00 107) t 2 + (2.80 105) t, Determine the length of time the pellet is accelerated
A sample contains 8.30×104 radioactive nuclei. In a time of 5 minutes, Evaluate the half life of the sample
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