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The filament of a certain lamp has a resistance that increases linearly with temperature. When a constant voltage is switched on, the initial current decreases until the filament reaches its steady-state temperature. The temperature coefficient of resistivity of the filament is 3.9 times 10-3 K-1. The final current through the filament is one- eighth the initial current. What is the change in temperature of the filament?
A potential energy function for a two-dimensional force is of the form U = 3.89x3 y - 5.96x. Calculate the force that acts at the point (1.28m,1.17m). Enter the x-component first and then the y-component.
To pull a 30 kg crate across a horizontal frictionless floor, a worker applies a force of 190 N, directed 20° above the horizontal. The crate moves 3.0 m. (a) What work is done on the crate by the worker's force? (b) What work is done on the crate by..
q1. a ranger in a national park is driving at 52 kmh when a deer jumps onto the road 86 m ahead of the vehicle. after a
A series circuit consists of a 15-%uF057 resistor, a 35-mH inductor, and a 25-%uF06DF capacitor. If the frequency is 100 Hz the power factor is
A series RCL circuit includes a resistance of 254, an inductive reactance of 865, and a capacitive reactance of 427. What is the voltage of the generator
A girl of mass 50.0 kg jumps off the bow of a 84.0-kg canoe that is initially at rest. If her velocity is 2.90 m/s to the right, what is the speed of the canoe after she jumps
a construction crew wants to extend a uniform rigid metal bar of length 7m and mass 400kg between two platforms which lie on the same horizonantally level. What force does the beam exert on the edge of the platform
Estimate the change in the Earth’s gravitational dipole moment, with respect to the Earth’s center, if the polar ice caps were to melt.
What's the result when we grow up InGaN on the substrat by MBE I want a (pdf) discruption or I want to talk to any one who knew that's result.
Suppose you make a new kind of compact disk that is the same thickness as a current disk but twice the diameter
Attaching this non-ideal voltmeter decreases the voltage across R2. Calculate the magnitude of this decrease using an emf of 14 V and R1 = R2 = 350 k?
Wire 1 and 2 are made of the same metal. What is the ratio p2/p1 of the resistivities of the two wires
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