If you touch the two terminals of a power supply with your two fingertips on opposite hands, the potential difference will produce a current through your torso. The maximum safe current is approximately 5 mA.
If your hands are completely dry, the resistance of your body from fingertip to fingertip is approximately 530 kΩ. If you accidentally touch both terminals of your 120 V household electricity supply with dry fingers, what current will flow, and will you receive a dangerous shock?
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The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?
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Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?
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You are driving to the grocery store at 20 m/s. you are 110m from an intersection when the traffic light turns red. assume that your reaction time is 0.50s and that your car brakes with constant acceleration. how far are you from the intersection when you begin to apply the brakes? what acceleration will bring you to rest right at the intersection? how long does it take you to stop after the light changes? the known values: vi=20m/s xi=110m t=.50s vf=0m/s xf=0m a=?
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If you touch the two terminals of a power supply with your two fingertips on opposite hands, the pot...
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