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A copper bar 2.5 m long has a circular cross section of radius 2 cm. One end is kept at 80 oC and the other end is kept at 0 oC. The surface of the bar is insulated so that there is negligible heat loss through it. If kcopper = 401 W.m-1.K-1, what is the thermal current in the copper bar?
Two friends hold on to a rope, one at each end, on a smooth, frictionless ice surface. What is the magnitude of the angular momentum of the system comprised of the two friends
When resistors 1 and 2 are connected in series, the equivalent resistance is 21.4 ?. When they are connected in parallel, the equivalent resistance is 4.08
A spherical capacitor contains a charge of 3.20 nC when connected to a potential difference of 220 V, Calculate the radius of the inner sphere
A bomber is flying horizontally over level terrain at a speed of 260 m/s relative to the ground and at an altitude of 2.60 km. At what angle from the vertical was the bombsight set
What is the specific heat capacity of other substance.
A kg steel ball strikes a wall with a speed of m/s at an angle of with the surface. It bounces off with the similar speed and angle. If the ball is in contact with the wall for s, what is the average force exerted on the ball by the wall.
examine the strengths and weaknesses of the various measures of investment attractiveness as used by Euro land Foods. Will all of the measures rank the projects identically? Explain why of explain why not?
At Zion National Park a loud shout produces the echo 3.40 s later from a colourful sandstone cliff. How far away is the cliff.
A "swing" ride at a carnival consists of chairs that are swung in a circle by 14.3 m cables attached to a vertical rotating pole, Determine the tension in the cable attached to the chair
A simple harmonic wave of amplitude 5.0cm, wavelength 70cm, What's the wave energy per unit length of the wire
We have a container of compressed air. Assume that air is a diatomic ideal gas. The volume of the container is 1.35 liters. Find the final volume of the gas
Block Ahas mass 1.00 kg, and block B has mass 3.00 kg. The blocks are forced together, compressing a spring S between them, What is the final speed of block A
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