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A coffee cup heater and a lamp are connected in parallel to the same 120-V outlet. Together, they use a total of 99 W of power. The resistance of the heater is 870?. Find the resistance of the lamp.
What is the magnitude of the maximum torque. What is the utmost load for this crane at an angle of 15° with the horizontal.
Assume that a 7.0-cm-diameter, 50 W light bulb radiates all its energy as a single wavelength of visible light. Estimate the magnetic field strength at the surface of the bulb
A beam of unpolarized light shines on a stack of five ideal polarizers, Find the angle between the axes of each pair of adjacent polarizers
If the particle is released from rest at the midpoint C, s=100mm, and the acceleration is measured as a= (4s) m/s2 , where s is in meters, evaluate the velocity of the particle when it reaches plate B, s=200mm, and the time it needs to travel C to ..
three resistors of 75, 50 , 100 ohms are connected to a 9 volt source. determine the power dissipated by the circuit
An ac generator with a frequency of 1.24 kHz and an rms voltage of 24.2V is connected in series with a 2.20 kOmega resistor and a 330 mH inductor. What is the average power consumed by this circuit
A fireman 44 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of 22° above the horizontal. If the speed of stream as it leaves the hose is 40m/s, at what height will stream of water strike the buil..
With a 0.100 kg mass at 0.10 m and 0.200 kg mass at 0.95 m suspended on a meter stick, the postion of the support when balance is achieved is 0.620 m. Calculate sum of counterclockwise moments about the end of the meter stick
The puck has a mass of 0.140kg. Its original distance from the center of rotation is 40.0 cm, and it moves with a speed of 70cm/s. The string is pulled downward 15cm by the hole in the frictionless table. Determine the work completed on the puck.
A 1400kg wrecking ball hangs from a 20m -long cable. By how much has the gravitational potential energy of the ball changed
A spaceship of mass 2.20×106kg is cruising at a speed of 4.20×106m/s when the antimatter reactor fails, blowing the ship into three pieces
In a dentist's office an X-ray of a tooth is taken using X-rays that have a frequency of 7.60 × 1018 Hz. What is the wavelength in vacuum of these X-rays
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