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A charging RC circuit controls the intermittent windshield wipers in a car. The emf is 12.0 V. The wipers are triggered when the voltage across the 121-µF capacitor reaches 10.0 V; then the capacitor is quickly discharged (through a much smaller resistor) and the cycle repeats. What resistance should be used in the charging circuit if the wipers are to operate once every 1.40 s?
___ k?
A piece of Nichrome wire has a radius of 5.00 x10-4 m. It is used in a laboratory to make a heater that uses 2.00 102 W of power when connected to a voltage source of 120 V. Ignoring an effect of temperature on resistance, estimate the necessary l..
Equipotential surface A has a potential of 5650 V, while equipotential surface B has a potential of 7850 V. How much work is done by the outside force in moving the particle from A to B
A ray of light traveling in air is incident on the flat surface of a piece of glass at an angle of 66.5° with respect to the normal to the surface of the glass, what is the refractive index of the glass
Consider a ring of radius R with the total charge Q spread uniformly over its perimeter. What is the potential difference between the point at the center of the ring and a point on its axis a distance 2R from the center
Stan and Ollie are standing next to a train track. Stan puts his ear to the steel track to hear the train coming. How far away is the train
A moving body undergoes uniform acceleration while travelling in a straight line between points X, Y and Z. The distances XY and YZ are both 40m. The time to travel from X to Y is 12s and from Y to Z is 6s.
The femur is a bone in the leg whose minimum cross-sectional area is about 3.60 multiply.gif 10-4 m2. Find the maximum stress that this bone can withstand
A certain gasoline engine has an efficency of 30% what would the hot resevoir temp be for a carnot engine having that efficency if it operates with a cold resevoir temp off 200C
Some sliding rocks approach the base of a hill with a speed of 18.0m/s . The hill rises at 40.0? above the horizontal and has coefficients of kinetic and static friction of 0.390 and 0.650, Find the acceleration of the rocks
A 0.255 kg puck, initially at rest on a frictionless horizontal surface, is struck by a 0.200 kg puck that is initially moving along the x axis with a velocity of 2.06 m/s. After the collision, the 0.200 kg puck has the speed of 1.02 m/s at an ang..
IP Two point charges, the first with a charge of +3.45×10?6 C and the second with a charge of -4.10×10?6 C, Find the magnitude of the electrostatic force experienced by the positive charge
Consider a rectangular loop of wire 6.8cm by 7.8cm in a uniform magnetic field of magnitude 1.4T. What is the average induced emf in the loop
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