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At 20.0°C, a mainly silicon resistor has a resistance of 275 ?, and a tungsten resistor has a resistance of 752 ?. At this temperature, the silicon resistor has a temperature coefficient of resistivity of ?0.070°C?1 and the tungsten resistor has a coefficient of 0.0050°C?1. At what temperature will their resistances be equal?
An object 2.0 cm high is projected onto a screen using a converging lens with a focal length of 35 cm. What is the distance of the lens from the screen
An ice-making machine inside a refrigerator operates in a Carnot cycle. It takes heat from liquid water at 0.0 degrees Celsius, How much heat |Q_H| is rejected to the room
A 2.00-cm-diameter parallel-plate capacitor with a spacing of 0.200mm is charged to 300V. What is the total energy stored in the electric field
How far away from the people is the plane.
At what distance along the central axis of a ring of radius 1.8 cm and uniform charge 66 C is the magnitude of the electric field maximum.
A block slides down a frictionless plane having an inclination of θ = 19.1 °. Find its speed when it reaches the bottom of the incline
A 550 -cm flask contains 0.450grams of a gas at a pressure of 140kPa, What is the molecular mass of this gas
An electronic device dissipating 30 W has a mass of 20g and a specific heat of 850 J/kgoC. The device is lightly used, and it is on for 5 min and then off for several hours, throughout which it cools to the ambient temperature of 25 o C.
A skier of mass 100 kg starts from rest and comes down a slope of constant angle 25 degrees with the horizon. What is the length of the slope
A light wave travels from point A to point B in vacuum. hat is the difference between the number of waves between A and B with and without the glass plate in place
A 1200 kg car is moving with a velocity of 20 m/s when the brakes are applied uniformly, Find the braking force on the car by finding the acceleration of the car
Two converging lenses having focal lengths of f1 = 10.9 cm and f2 = 20.0 cm are placed d = 50.0 cm apart. What is the overall magnification of the system
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