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A toaster rated at 1040 Woperates on a 120 V household circuit and a 4.00 m length of nichrome wire as its heating element. The operating temperature ofthis element is 314°C. What is the cross-sectional area of the wire?
m2
The tires of a car make 69 revolutions as the car reduces its speed uniformly from 92km/h to 40km/h . The tires have a diameter of 0.80m. What was the angular acceleration of the tires
A grating has 350 rulings/mm and is illuminated at normal incidence by white light. A spectrum is formed on a screen 30cm from the grating. what range of wavelength passes throught the hole
A 11.0 cm -diameter compressed-air tank is 70.0 cm tall. The pressure at 30.0 degrees C is 130 atm. How many moles of air are in the tank
the moon is 3.5 * 106 m in diameter and 3.8 * 108 m from the earth's surface. compute the diameter of the moon's image
A 4.0mW laser beam has its electric field vertical. what's the power of the transmitted beam
An electron is in a vacuum near earth's surface and located at y =0 on a vertical y axis. At what value of y should a second electronbe placed such that its electrostatic force on the first electronbalances the gravitational force on the first electr..
A skier of mass 73 kg is pulled up a slope by a motor-driven cable, What power (expressed in hp) must a motor have to perform this task
Capacitors won't hold a charge indefinitely; as time goes on, charge gradually migrates from the positive to the negative plate. What is the leakage resistance
From the difference in mass of a hydrogen atom (Appendix B) to the mass of a proton and an electron (Table 1.5), estimate the binding energy of the electron in the hydrogen atom. Compare this to the ionization energy of the ground state electron a..
Two people carry a heavy electric motor by placing it on a light board 1.55 m long. One person lifts at one end with a force of 390 N, What is the weight of the motor
A 300-g mass at the end of an ideal spring vibrates up and down in such a way that it is 2.0 cm above the tabletop at its lowest point and 16 cm above at its highest point. find the speed and acceleration of the mass when it is 12 cm above the tabl..
A 3.0 kg particle with velocity v = (5.0 m/s)i - (6.0 m/s) j is at x = 3.0 m, y = 8.0m. It is pulled by a 7.0 N force inthe negative x direction. What torque about the origin acts on the particle
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