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The big mall near Sally and Amy's city has extended their operating hours to accommodate the huge crowds expected for the After Thanksgiving Sale. In their eagerness to beat the crowd, Sally forgets to turn off the headlights when she gets out of the car at the mall parking lot. The headlights in her car require 53.0 W of power each, and her 12.0 V car battery is rated at 92.0 A · h. When the two friends come back to the car after a long and successful shopping spree, they find that the car refuses to start as the battery is now completely discharged. How long were they in the mall? Assume that they come out just as the battery dies.
A 3.18-nF parallel-plate capacitor is charged to an initial potential difference ?Vi = 100 V and is then isolated. How much work is required to withdraw the porcelain sheet
Two long parallel wires each carry a current of 5. A directed to the east. The two wires are separated by 8 cm. What is the magnitude of the magnetic field at a point that is 5.0 cm from each of the wires.
There is an electric field of 113N/C directed along the + x axis. If the string makes an angle 26 degrees with the y axis when the sphere is in stability, what is the charge on the sphere.
What's the moxt orbital angular momentum that could be added to an atomic electron initially in the 6d state, What would be the new state
The sun is more massive than the moon, but the sun is farther from the earth. Which one exerts a greater gravitational force on a person standing on earth? Give the answer by determining the ratio Fsun/ Fmoon of magnitudes of gravitational forces.
A copper wire is 10.00 m long and has a cross-sectional area of 1.00 x10-4 m2. This wire forms a one turn loop in the shape of a square and is then connected to the battery that applies a potential difference of 0.200 V.
A ball is thrown toward a cliff of height (h) with a speed of30 m/s and an angle of 60 degrees above the horizontal. What is the ball's impact speed
Light of wavelength 450 nm falls on the 0.48 mm wide slit and forms a diffraction pattern on a screen 1.1 m away.
A 55.0 kg circus performer oscillates up and down at the end of a long elastic rope at a rate of once every 8s. The elastic rope obeys Hooke's Law. By how much is rope extended beyond its unloaded length while the performer hangs at rest?
Suppose a muon produced as a result of a cosmic ray colliding with a nucleus in the upper atmosphere has a velocity v = 0.9500c. What distance is this in the muon's frame
A satellite moves in a circular orbit around the Earth at a speed of 5680 m/s. Determine the period of the satellite's orbit
A chair of weight 125 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F = 35.0 N directed at an angle of 42.0 below the horizontal and the chair slides along the floor. Using Newton's laws, compute..
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