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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 temperature of the bar 25 cm from the hot end.
A 1100 car traveling at a speed of 23 skids to a halt on wet concrete where = 0.40. How long are the skid marks
A student decides to move a box of books into her dormitory room by pulling on a rope attached to the box, Find the acceleration of the box
The counterbalance w1 weighs 100 N. Find out the weight w2 and the angle α needed so that no force is exerted on the hip joint by the leg plus cast.
After a plant or animal dies, its 14C content decreases with a half-life of 5730 years. what is the age of the ancient site
A skier traveling 11.0 m/s reaches the foot of a steady upward 18.0° incline and glides 13.2 m up along this slope before coming to rest. What was the average coefficient of friction?
Frame S' travels at speed V_1 along the x axis of frame S (in the standard configuration). Frame S'' travels at speed V_2 along the x'' axis of frame S'; (also in the standard configuration). By applying the standard Lorentz transformation twice find..
Where Is The Net Force Zero? Three point charges lie along the x-axis. The positive charge q1 = 15.0 ?C is at the x = 2.00 m, What is the x coordinates of q3
A cop car drives at 30m/s toward the scene of a crime, with its siren sounding (f = 2125 Hz.) Estimate the frequency heard by people at the crime scene as the siren approaches and the frequency heard as the siren moves away from people.
A tungsten target is struck by electrons that have been accelerated from rest through a 29.9-kV potential difference. Find the shortest wavelength of the radiation emitted
A parallel-plate capacitor is constructed with circular plates of radius 5.5×10?2m . The plates are separated by 0.23mm, Find the value of the dielectric constant, ?.
You are given the job of evaluating potential power line systems. What percentage of the power would be dissipated in the low-voltage power line
Compressed air is used to fire a 60 ball vertically upward from a 1.1--tall tube. The air exerts an upward force of 2.2 on the ball as long as it is in the tube. How high does the ball go above the top of the tube? Express your answer to two signific..
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