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Compute all parts of given question:
Question: A 0.20mm diameter copper wire is 13m long.
Part I: Find its resistance?
Part II: What is the power dissipation in the wire if the potential difference across its ends is 14V?
Part III: Repeat part (I) if the wire is immersed in liquid nitrogen at 77 K?
Part IV: Repeat part (II) if the wire is immersed in liquid nitrogen at 77 K?
Emily has a field with uniformly cut grass of height 2 cm which grows at a constant rate. How long would it sustain each animal alone
a 100N force acts for 0.05s on a .10kg ball with an initial velocity of -20m/s, What is the final momentum of the ball
In the 1950s, an experimental train that had a mass of 2.00 104 kg was powered across a level track by a jet engine that produced a thrust of 5.30 105 N for a distance of 509 m. Assume that air resistance is negligible.
For a very simple model, consider a solid iron sphere 2.00 cm in radius. Assume the temperature is always uniform throughout its volume. Find the energy of one photon
Determine the magnitude of the total initial momentum of the two-block system. Find , the magnitude of the final velocity of the two-block system. What is the change in the system's kinetic energy due to the collision?.
an engine performs a total of 15000 j of work in one minute: what is its power output in kilowatts and in horsepower
A man strides across a bed of embers. Assume the glowing charcoal is covered with a thin layer of ash 0.50 mm thick and is at a temperature of 650C. The thermal conductiviity of ash and charcoal is 1.5 W/ (mxK). (a) Estimate the heat transferred t..
Two groups of canoeists meet in the middle of a lake. After a brief visit, a person in canoe 1 pushes on canoe 2 to separate the canoes. what is the mass of canoe 2
A sailor strikes the side of his ship just below the surfaceof the sea. He hears the echo of the wave reflected from the oceanfloor directly 3.09 s later. How deep is the ocean at this point
A convex mirror has a radius of curvature of 89 cm. An image is produced 40 cm in front of the mirror. Where is the object
Two resistors, 64.0 ohm and 58.0 ohm are connected in parallel. The current through the second resistor is 2.00 A. What is the total power supplied to the two resistors
As part of an exercise routine a 47.0 kg person climbs a set of stairs. Each stepis18.0 cm high and thereare 78 steps in the staircase. Assuming the work done coming down the staircase is negligible, howmany times must this person climb the staircase..
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