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A piece of Nichrome wire has a radius of 5.2 x 10-4 m. It is used in a laboratory to make a heater that dissipates 3.50×102 W of power when connected to a voltage source of 100 V. Ignoring the effect of temperature on resistance, estimate the necessary length of wire.
Suppose the emf of a coil rotating in a magnetic field is zero at t = 0 , and increases to its first peak at t = 0.08 ms. What is the period of the output
A horizontal uniform bar of mass 2.7 and length 3.1 is hung horizontally on two vertical strings. String 1 is attached to the end of bar, and string 2 is attached a distance 0.7 from other end. A monkey of mass 1.6 walks from one end of the bar to th..
Graph the power of the laser when it's on. b) Compute the energy in the pulse. c) Compute the number of photons in the pulse.
A particle with a positive charge 2e moves with a velocity V= (2i + 3j - k) m/s through a region where both a uniform magnetic field and a uniform electric field exist. Calculate the total force on the moving particle
If the string is wrapped to the pulley and a downward Force is applied to the string
A stone is thrown straight up with a speed of 25.0 m/s from the top of a building 55.0 m tall. How far above the ground will the stone go
A basketball player makes a jump shot. The 0.603 kg ball is released at a height of 2.07 m above the floor with a speed of 7.19 m/s. What is the work done on the ball by air resistance
A constant horizontal force Fa pushes a 3.70 kg FedEx package across a frictionless floor on which a xy coordinate system has been drawn. it gives the package's x and y velocity components versus time t. (The vx axis is marked in increments of 1.2..
If a current of 8.3 A is drawn from the battery when a resistor R is connected across the terminals ab of the battery, what is the power dissipated by the resistor R
In the Bohr model of the hydrogen atom, an electron moves in a circular path around a proton. The speed of the electron is approximately 1.89 106 m/s Find the centripetal acceleration of the electron.
A speed skater moving across frictionless ice at9.6m/s hits a 5.0 m wide patch of rough ice. What is her acceleration on the rough ice
Suppose in the drawing that I1 = I2 = 42.4 A and that the separation between the wires is 0.0215 m. What is the magnitude of the external field
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