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Two cylindrical bars, each with diameter of 2.00 cm, are welded together end-to-end. One of the original bars is copper (resistivity 1.72e-8 ohm*m) and is 0.320 m long. The other bar is nichrome (resistivity 100.00e-8 ohm*m) and is 0.125 m long. What is the resistance among the ends of the welded bar at 20oC?
A vertical straight wire carrying an upward 11 A current exerts an attractive force per unit length of 8.8 multiplied by 10-4 N/m on a second parallel wire 8.0 cm away
A beam of protons at an accelerator creates a current of 164uA. If the beam is focused on a target, how many protons strike the target in 60.0s
The skipper of a boat wants to go straight across a river that is1.5 kilometer wide. Find the speed of the boat according to an observer on the shore
the magnetic flux through a circuit is reduced from 35 tm2 to 5 tm2 in 0.1s. the current induced in the circuit is 3.6
a student ate a thanksgiving dinner that totaled 2400 cal. He wants to use up all that energy by lifting a 27 kg mass a distance of 1.0 m. How many times must he lift the mass
A viscous fluid is flowing through two horizontal pipes. They have the same length, although the radius of one pipe is three times as large as the other. what is the volume flow rate QB in the wider pipe
which of the following represents work: A compressed spring that is allowed to expand. The normal force on a stationary crate. The frictional force on a crate that is being pushed across a flat floor.
A small power plant produces a voltage of 6kV and 150A. the voltage is stepped up to 240kV by a transformer before it is transmitted to a substation. What is the current in the transmission line from the plant to the substation
A charge of -3.8 × 10-9 C is at the origin and a charge of 8.1 × 10-9 C is on the x-axis at x = 3 m. At what location on the x-axis is the electric field zero
what is the phase difference in a youngs double slit experiment where the intensity is half that of the central
A cylnder holds .5 moles of an ideal gas at temp 334K. The gas expands isothermally from an initail volume of .03 m^3 to a final volume of .4m^3
two rockets are flying in the same direction and are side by side at the instant their retrorockets fire. rocket a has
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