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A three-way lightbulb can produce 50W, 100W or 150W at120V. Such a bulb contains two filaments that can beconnected to the 120V individually or in parallel. Describehow the connections to the two filaments are made to give each ofthe three wattages. What must be the resistance of each filament?
A computer disk is 8.0 cm in diameter. A reference dot on the edge of the disk is initially located at theta=45 degrees. The disk accelerates steadily for 0.50 s, reaching 2000 rpm, after those coasts at steady angular velocity for another 0.50 s.
A 129-kg sculpture hangs from a horizontal rod that serves as a pivot about which the sculpture can oscillate. How far is the pivot from the sculpture's center of mass
The molar mass oxygen gas is 32.0 x 10^-3 kg/mol. If the gas is at 21 degrees C, find the root-mean-square speed for an oxygen molecule
A photon of wavelength 0.50801 nm strikes a free electron that is initially at rest. What is the speed of the recoil electron after the collision
One generator uses a magnetic field of 0.15 T and has a coil area per turn of 0.045 m2. A second generator has a coil area per turn of 0.015 m2. What magnetic field should be used in the second generator
Kathy is changing the tire of her car on a steep hill 20.0 m high.She trips and drops the 10.0-kg spare tire, What is the speed of the tire at the top of the next hill
Four charges are located in a plane as follows: q1 = -5 uC at (4,0) m; q2 = -3 uC at (4,4) m; q3 = -4 uC at (0,4) m; q4 = -2 uC at (0,0) m. Find the magnitude and direction of the resultant field at (2,2)
A metal bar f length L = 1.8 m slides along two horizontal metal rails, what is the emf induced across the ends of the bar
While testing speakers for a concert, Tomás sets up two speakers to produce sound waves at the same frequency, What are the possible frequencies of the sound waves coming from the speakers
A straight horizontal garden hose 37.0 m long with an interior diameter of 2.10 cm is used to deliver 20oC water at the rate of 0.430 liters/s.
The electric field 2.0 cm from a small object points away from the object with a strength of 270,000 nC. What is the objects charge
An infinitely long solenoid of radius 2.5cm and 100 turns/cm carries an initial current of 1 A. what is the electromotive force induced in the loop
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