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At 20.0°C, a mainly silicon resistor has a resistance of 545 Ω, and a tungsten resistor has are sistance of 752 Ω. At this temperature, the silicon resistor has a temperature coefficient of resistivity of−0.070°C−1 and the tungsten resistor has acoefficient of 0.0050°C−1. At what temperature will their resistances be equal?
A home receives 1.3kW of electric power from a transformer on a nearby pole. What fraction of the power is lost in this transmission line
Define the terms “Coefficient of Static Friction”, and “Coefficient of Kinetic Friction”. What is friction? The force probe reading will represent the frictional force, which of Newton’s Laws allows us to do this? Explain.
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 camera sensor
A .228g wires are stretched between two points 77.20 cm apart. The tension in the wire is 618N. Find the frequency of the first harmonic. Reply in units of Hz.
A uniform cylinder of mass m=6.30 kg and radius R=0.132 m is released from rest on an inclined plane (theta=32.7 deg), What is the speed of the center of mass of the cylinder just before it reaches the horizontal surface
A spaceship of proper length 306 m takes 0.75 µs to pass an Earth observer. Determine the speed of this spaceship as measured by the Earth observer.
A simple pendulum makes 143 complete oscillations in 2.80 min at a location where g = 9.80 m/s2. Find the period of the pendulum
A thermally isolated flask containing helium gas initially at 11 K, allows the gas to slowly escape through a small tube until the pressure inside is 0.98 atm, what was the initial pressure
The energy gap in silicon is 1.1eV. The average electron effective mass is 0.31m, where m is free electron mass. Calculate the electron concentration in the conduction band of silicon at T=300K
A boat with initial velocity of vo is slowed by africtional force, F = -beav, find the time and distance required to stop
The biochemistry that takes place inside cells depends on various elements, such as sodium, potassium, and calcium, that are dissolved in water as ions, What is the resistance of the ion channel
A horizontal pipe contains water at a pressure of 150 {rm kPa} flowing with a speed of 1.30 {rm m/s}. The pipe narrows to one-half its original diameter. What is the speed of the water.
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