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A long solenoid (cross-sectional area = 0.85 x 10-6 m2, number of turns per unit length = 1878 turns/m) is bent into a circular shape so it looks like a doughnut. This wire-wound doughnut is called a toroid. Assume that the diameter of the solenoid is small compared to the radius of the toroid, which is 0.052 m. Find the emf induced in the toroid when the current decreases from 2.5 A to 1.1 A in a time of 0.15 s.
Four rays of light are incident on a surface of water. Their angles of incidence are 20, 30, 45, y 60 degrees. Calculate the angle of refraction for each ray
You throw a ball toward a wall at speed 20 m/s and at angle theta=60 degrees above the horizontal. What is the angle when it hits the wall
A 237 g mass is connected to a light spring of force constant 3 N/m that is free to oscillate on a horizontal, frictionless track. What is the maximum acceleration of the mass
A buzzer generates a sound by vibrating with a frequency of 440 Hz in air. If this buzzer is placed under water, What frequency would a fish hear
In proton-antiproton annihilation, a proton and an antiproton (a negatively charged particle with the mass of a proton) collide and disappear, producing electromagnetic radiation, Find the total energy of the radiation
The radius of the GM tube's window is 3.5 cm. The source is 3 cm from the GM tube. Compare the surface area of a sphere 3 cm from the source to the area of the GM tube's window.
A football quarterback is moving straight backward at a speed of 2.0 m/s when he throws a pass to a player 20.0 m straight downfield. How long does it take to get to the receiver
You are examining a flea with a converging lens that has a focal length of 4.40 cm. If the image of the flea is 8.00 times the size of the flea, how far is the flea from the lens
The molecular mass of helium is 4 g/mol, the Boltzmann's constant is 1.38066 × 10?23 J/K, the universal gas constant is 8.31451 J/K · mol, What is the average kinetic energy of each helium atom
A 4.00-kg particle moves along the x axis. Its position varies with time according to x = 3.0t + 2.0t^2 where x is in meters and t is in seconds. Find the acceleration of the particle
For this question, I got 196 nC but apparently its -196 nC and i was hoping you could explain why the answer is negative: A styrofoam ball of mass 0.120 g is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on ..
Coherent light with wavelength 595 nm passes by two very narrow slits, and the interference pattern is observed on a screen a distance of 3.00 {rm m} from the slits. The first-order bright fringe is a distance of 4.84 {rm mm} from the center of th..
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