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A 12 Volt battery (a real emf source) is connected to a light bulb rated to consume 48Watt at 12Volt. The current flowing through the filament of the light bulb is measured to be 3.0 Amp.
Obtain the internal resistance and terminal voltage of the battery.
Find is this battery a good match for the light bulb? Why?
a cable of cross-sectional area of 4.00 cm2 and 12.0 m long stretches by 2.00 mm when subjected to a load of 25000 kg.
The first mass M (9.50 kg) is sitting on an inclined plane whose angle above the horizontal is 35 degrees. What is the minimum mass, m, in kg, needed to keep the block from sliding down the incline
A partly full paint can has 0.42 U.S. gallons of paint left in it. how thick is the layer of wet paint
A 400kg baby grand piano is raised to the roof of a 100m building. If the cable breaks as it reaches this height, what will its velocity be the instant prior to impact
The resistance of a metal rod depends on temperature. The resistance of a metal rod does not depend on itsconductivity. The resistance of a metal rod with fixed cross-sectional area dependson the shape of the cross sectional area.
A pulley system has an efficiency of 87.5 percent. How much of the rope must be pulled in if a force of 648 N is is needed to lfit a 150kg desk 2.46m .
Tritium has a half-life of 12.3 y and can also be used to date organic matter. If the activity of tritium is determined to be 3% of the expected activity, what is the age of the sample
The rain-soaked shoes of a man may explode if ground current from nearby lightning vaporizes the water. find what average current is required to vaporize water
Observations of a certain galaxy show that stars at a distance of 16 pc from the center of the galaxy orbit a central supermassive black hole at a speed of 200 km/s
a child operating a radio-controlled model car on a dock accidentally steers it off the edge. the cars displacement 0.9
Water runs out of the horizontal drainpipe at the rate of 120 liters per minute. It falls 3.20 m to the ground. Assume the water doesn't splash up, what average force does it exert on the ground? (1 liter = 1 kg.)
A stone thrown horizontally from a height of 6.22 m hits the ground at a distance of 14.30 m. find the speed of the stone as it hits the ground
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