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One end of a brass bar is maintained at 296°C, while the other end is kept at a constant however lower temperature. The cross-sectional area of the bar is4.00 10-4 m2. Because of insulation, there is negligible heat loss during the sides of the bar. Heat flows during the bar, however, at the rate of 3.0 J/s. What is the temperature of the bar at a point0.20 m from the hot end?
A 2 g lead (cp = 128 J/kg•°C) bullet travelling at 325m/s is stopped by the large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet whereas the other half is transmitted to the tree, wha..
A velocity selector 1ms a magnetic field of magnitude 0.3 T perpendicular to an electric field of magnitude 0.32 MV/m. The mass of an electron is 9.11 times 10-31 kg. How much energy must electrons have order to pass through undeflected? Answer in un..
Three single-phase step-up transformers rated at 10MVA, 4.6kV/13.8kV are connected in Wye-Delta configuration. The three transformers are used to feed a 20MVA load at 0.9 p.f. With an efficiency of 96%. Find the secondary line voltage.
A beam of nuclei is used for cancer therapy. Each nucleus has an energy of 108 MeV, How many nuclei are in the beam
Four point charges, Q1(-15,0,15), Q2(15,0,15), Q3(15,0,-15) and Q4(-15,0,-15) in cartesian coordinates are surrounded with air. If charges Q2 = -Q3 = 2 microCoulomb, Find the forces applied to each point from other charges
A solid cylinder (radius = 0.160 m, height = 0.200 m) has a mass of 14.6 kg. This cylinder is floating in water. How much of the height of the cylinder is in the oil
A 1625 kg car, having run out of gas, is at rest on a level surface. If the person applies a force of 765 kg m/s^2 for 8 seconds, how much work did he do on the car
question1if a race car completes a mi oval track in s what is its average speed? did the car accelerate? i know what an
en boxes, each 21.0 cm high and weighing 235 N, initially are all side by side on the floor. Compute the power necessary to stack the boxes
It is desired to place a satellite in earth polar orbit such that successive ground tracks at the equator are spaced 3000 km apart
question two point charges are separated by 10.0 cm and have charges of 2.00 and -5.00 muc respectively. at what point
bjorn is standing at x1 550 m. firecracker 1 explodes at the origin and firecracker 2 explodes at x2 850 m. the
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