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In an electric shaver, the blade moves back and forth over a distance of 2.0 mm in simple harmonic motion, with frequency 122 Hz. Find
(a) the amplitude (in mm),
(b) the maximum blade speed, and
(c) the magnitude of the maximum blade acceleration.
The invaders’ thermometer shows the temperature on earth to be 58 °I. Using logic similar to that in Example 1 in the text, illustrate what would this temperature be on the Celsius scale?
A current of 2.5 a runs through 20 circular wire loops of diameter 10 cm. What is the magnetic field magnitude and direction at the center of the loops? (Show the derivation of any formula that you use.)
The image behind a convex mirror (radius of curvature = 76.0 cm) is located 32.0 cm from the mirror. Where is the object located (give the distance to the mirror)
A uniform electric field exists in the region between two oppositely charged parallel plates 1.67cm apart. A proton is released from rest at the surface of the positively charged plate and strikes the surface of the conflicting plate in a time int..
A 48\Omega resistor is connected across a battery, and a 29mA current flows. What is the battery's emf? What is the internal resistance
Suppose that an electron trapped in a one-dimensional infinite well of width 322 pm is excited from its first excited state to the state with n = 5. What energy (in eV) must be transferred to the electron for this quantum jump
A train 450 m long is moving on a straight track with a speed of 82.1 km/h. The engineer applies the brakes at a crossing, and later the last car passes the crossing with a speed of 16.7 km/h. Assuming constant acceleration, determine how long the..
A sheet of plywood 1.39 cm thick is used to make a cabinet door 55.5 cm wide by 69.5 cm tall, what is the moment of inertia of the door about the hinges
A loudspeaker at the origin emits a 140Hz tone on a day when the speed of sound is 340 m/s. What is the distance between these two points
A very long solenoid with a circular cross section and radius r= 6.10 cm with n= 1.20E+4 turns/m has a magnetic energy density uB= 4.50 mJ/m3. What is the current in the solenoid
With a 1400 Mohm resistor across its terminals, the terminal voltage of a certain battery is 2.56V. Find the internal resistance of this battery
A ball is kicked with an initial velocity of 15.5 m/s in the horizontal direction and 10.5 m/s in the vertical direction, At what speed does the ball hit the ground in m/s
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