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A Nichrome wire is used as a heating element in a toaster. From the moment the toaster is first turned on to the moment the wire reaches it maximum temperature, the current in the wire drops by 20.0% from its initial value. What is the temperature change in the wire? The temperature coefficient of resistivity for Nichrome is 0.000400 (°C)-1.
A refracting telescope has an objective lens with a focal length of 2.30 m and an eyepiece with a focal length of 3.50 cm. by what factor is the angular size of an observed object reduced
A prospector finds a solid rock composed of granite (density = 2650 kg/m3) and gold, What mass of gold is contained in the rock
If it takes light 3 ns to travel 0.514 m in an optical cable, what is the index of refraction of the cable
A movie star catches a reporter shooting pictures of her at home. She claims the reporter was trespassing and to prove her point, How far away from the subject was the reporter standing
Find the critical angle for an optical fiber whose core has n value of 1.50 and whose cladding has n value of 1.15
A simple pendulum has a length L and a mass m. At its highest point, the pendulum mass is 0.25L above its lowest point. What is the speed of mass when it is at its lowest point
A light beam is incident on a piece of zircon (n = 1.923) at the Brewster's angle. determine the value of Brewster's angle
What frequency is heard by an observer who hears the 450-Hz siren on a police car traveling at 35 m/s away from her
A battery with an emf of 12 volts is coonected to a 60 watt light bulb and an ammeter. The ammeter reads 75 mA
Physics: Solve a population doubling question, An easy way to find the time it takes for compound interest to double an investment is to divide 72 by the interest rate in percent.
Compute the acceleration of each box decide maximum distance the car rolls up the hill
The loop, having rotated by 45°, rotates clockwise another 30°, so that the normal to the plane points at an angle of 75° with respect to the direction of the magnetic field. Find the magnetic flux through the loop
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