Check Your Understanding Copper wires use routinely used for extension cords and house wiring for several reasons. Copper has the highest electrical
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- A 900-kg machine base is rolled along a concrete floor using a series of steel pipes with outside diameters of 100 mm. Knowing that the coefficient of rolling resistance is 0.5 mm between the pipes and the base and 1.25 mm between the pipes and the concrete floor, determine the magnitude of the force P required to slowly move the base along the floor.arrow_forwardlength. Two wires A and B are of the same Their diameters are in the ratio 1: 2 and the Young's modulii are in ratio 2:1. If they are pulled by the same force, then elongations will be in ratio (a) (c) 4:1 1:2 (b) (d) 1:4 2:1arrow_forwardA rigid bar of mass 15 kg is supported symmetrically by three wires each 2.0 m long. Those at each end are of copper and the middle one is of iron. Determine the ratios of their diameters if each is to have the same tension.arrow_forward
- A device which tests the resistance to wear of two materials A and B is shown. If the link EO has a velocity of 4.8 ft/sec to the right when 0 = 46°, determine the magnitude of the rubbing velocity VA. Assume a = 5 in., b = 14 in., r = 7 in. E Answer: VA = i ft/sec A B barrow_forwardA device which tests the resistance to wear of two materials A and B is shown. If the link EO has a velocity of 3.8 ft/sec to the right when 9-46%, determine the magnitude of the rubbing velocity VA Assume a 4 in., b-11 in.r-5 in.. Answer: VA ft/secarrow_forwardYou are working in a factory that produces long bars of copper with a square cross section. In one section of the production process, the bars must slide down a plane inclined at an angle 8 = 24.0° to the horizontal. It has been found that the bars travel with too high a speed and become dented or bent when they arrive at the bottom of the plane and must be discarded. In order to prevent this waste, you devise a way to deliver the bars at the bottom of the plane at a lower speed. You replace the inclined plane with a pair of parallel metal rails, shown in the fiqure below, separated by a distance { = 2.10 m. R m The smooth bars of mass m = 1.00 kg will slide down the smooth rails, with the length of the bar always perpendicular to the rails. The rails are immersed in a magnetic field of magnitude B, and a resistor of resistance R = 1.25 N is connected between the upper ends of the rails. Determine the magnetic field necessary (in T) in your device so that the bars will arrive at the…arrow_forward
- You are working in a factory that produces long bars of copper with a square cross section. In one section of the production process, the bars must slide down a plane inclined at an angle 0 = 23.5° to the horizontal. It has been found that the bars travel with too high a speed and become dented or bent when they arrive at the bottom of the plane and must be discarded. In order to prevent this waste, you devise a way to deliver the bars at the bottom of the plane at a lower speed. You replace the inclined plane with a pair of parallel metal rails, shown in the figure below, separated by a distance = 1.80 m. R B m The smooth bars of mass m = 1.00 kg will slide down the smooth rails, with the length of the bar always perpendicular to the rails. The rails are immersed in a magnetic field of magnitude B, and a resistor of resistance R = 1.60 ₪ is connected between the upper ends of the rails. Determine the magnetic field necessary (in T) in your device so that the bars will arrive at the…arrow_forwardIn the figure below, suppose the length L of the uniform bar is 3.50 m and its weight is 240 N. Also, let the block's weight W = 350 N and angle 0 30°. The wire can withstand a maximum tension of 500 N. C - X→ com В (a) What is the maximum possible distance x before the wire breaks? (b) With the block placed at this maximum x, what is the horizontal component of the force on the bar from the hinge at A? N (right) (c) What is the vertical component of this force? N (up)arrow_forwardYou are working in a factory that produces long bars of copper with a square cross section. In one section of the production process, the bars must slide down a plane inclined at an angle 0 = 24.0° to the horizontal. It has been found that the bars travel with too high a speed and become dented or bent when they arrive at the bottom of the plane and must be discarded. In order to prevent this waste, you devise a way to deliver the bars at the bottom of the plane at a lower speed. You replace the inclined plane with a pair of parallel metal rails, shown in the figure below, separated by a distance l = 2.50 m. B m The smooth bars of mass m = 1.00 kg Will slide down the smooth rails, with the length of the bar always perpendicular to the rails. The rails are immersed in a magnetic field of magnitude B, and a resistor of resistance R = 1.55 N is connected between the upper ends of the rails. Determine the magnetic field necessary (in T) in your device so that the bars will arrive at the…arrow_forward
- A resistance strain gauge with gauge factor of 2 is bonded to a steel member, which is subjected to a strain of 1 × 10-6. The original resistance value of this strain gauge is 120. The change in resistance due to the applied strain is?arrow_forward)A strand of dragline silk is 6 µm about in diameter, about 10% the diameter of a human hair. What is the largest mass that can be supported by a wire of dragline silk and by a very fine copper wire of the same diameter? (Tensile strength of silk: 1000 × 106 N/m² and tensile strength of copper: 200 × 106 N/m²) 0000arrow_forwardCalculate the maximum load that can be applied to a wire with a diameter of 6 mm and for which the tensile strength is 2,825 MN/m?? Give your answer in kN and as a whole number.arrow_forward
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