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Problem: A wire 3.00 m long and 0.450 mm2 in cross-sectional area have a resistance of 39ohm at 20°C. If its resistance increases to 39.7ohm at 27.0°C,
Part A: What is the temperature coefficient of resistivity?
= _____ °C-1
I need help to determine the temperature coefficient of resistivity.
a constant force 2.00 ni 3.00 nj acts on a 5.00 kg object as it moves in a straight line from the position 1 1.00 m
The tires of a car make 66 revolutions as the car reduces its speed uniformly from 86km/h to 31km/h . The tires have a diameter of 0.81m. What was the angular acceleration of the tires
The electric field just above the surface of the charged drum of a photocopying machine has a magnitude E of 2.7 x 105 N/C. What is the total charge in coulombs on the drum
A block of mass M=0.20 kg is attached to a spring with force constant k=12.0 N/cm. Calculate the period the resulting oscillations and the total energy of the system assuming no damping
What length in meters would be needed for a runaway
a heat engine operating between 40 C and 380 C has an efficiency 60% of that of a Carnot engine operating between the same temperatures. at what rate does it exhaust heat
a bar of gold bar a is in thermal contact with a bar of iron bar b of the same length and area. one end of the compound
a 2.0kg 20cm diameter turntable rotates at 100rpm on frictionless bearings. two 500g blocks fall from above hit the
An electron moves at right angles to a magnetic field of 0.18T. What is its speed if the force exerted on it is 9.1×1015 N
A tall, cylindrical chimney falls over when its base is ruptured. Treat the chimney as a thin rod of length 55.0 m. At the instant it makes an angle of 35.0° with the vertical as it falls, what is: The radial acceleration of the top? The tangential ..
question1a 150 30.0-cm-diameter turntable rotates on frictionless bearings at 61.0. a 17.0 block sits at the center of
two ants race across a table 52 cm long. one travels at 4.72 cms and the other at 3 cms. when the first one crosses the
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