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a heater and a motor are powered in parallel from the same 220v power supply. the motor draws 2A and the heater draws 17A.
a) what is the resistance of the motor? asume it is pure resistive
b) what is the resistance of the heater?
c) what is the total power dissipated by the dryer?
d) if the dryer runs for 8hrs per week how much does it cost to operate it for 1 year? assume that electricity costs $0.17/kwh.
What is the launch speed of a projectile that rises vertically above the Earth to an altitude equal to four times the Earth's radius before coming to rest momentarily
LASIK eye surgery uses pulses of laser light to shave off tissue from the cornea, reshaping it, What is the power of one laser pulse
A stone has a mass of 6.0 x 10-3 kg and is wedged into the tread of an automobile tire, as the drawing shows. The coefficient of static friction between the stone and each side of the tread channel is 0.90.
What is the rms current in an RC circuit if R= 5.20 K? , C= 1.50 uF, and the rms applied voltage is 120 V at 60.0 Hz
what average power was developed. A curve of radius 70 m is banked for a design speed of 110 km/h. If the coefficient of static friction is 0.30 (wet pavement), at what range of speeds can a car safely make the curve.
The electric field between the plates of the velocity selector is 4900 V/m, and the magnetic fields in both the velocity selector, compute the radius r of the path for a singly charged ion with mass m = 4.29 10-26 kg
A engineer designs a heat engine using flat-plate solar collectors. What is the maximum possible efficiency of this engine
An alpha particle (the nucleus of a helium atom) consists of two protons and two neutrons. what is the strength of the magnetic field
Kim has a metal casting company which makes commemorative coins. She has 0.12 cubic meters of silver which she needs to make into 1.07E5 coins of thickness 2 mm. If she uses all of the silver, what is the diameter in centimeters of each coin.
A sinusoidal electromagnetic wave from a radio station passes perpendicularly through an open window that has area of 0.600m^2. How much energy does this wave carry through the window
A motorboat is pointed due south, and its motor gives the boat a constant speed of 5.00 m/s through still water. Find the magnitude and direction of the boat's total velocity
The maximum strength of the earth's magnetic field is about 7.0 x 10-5 T near the south magnetic pole. What is the minimum number of turns (area per turn = 0.021 m2) that the coil must have to produce an rms voltage of 170 V
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