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What is the purpose of this wire
  At some automobile toll-collecting stations, a thin metal wire sticks up from the road and makes contact with cars before they reach the toll collector. What is the purpose of this wire? 1. …
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What resistive force does the wood exert on the bullet
  A rifle with a barrel length of 59 cm fires a 8 g bullet with a horizontal speed of 350 m/s. The bullet strikes a block of wood and penetrates to a depth of 15 cm. What resistive force (assu …
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Determine the number of pounds of helium within it
  The helium-filled blimp shown in Fig. P1.52 is used at various athletic events. Determine the number of pounds of helium within it if its volume is 68,000 ft3 and the temperature and pressur …
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What is the speed of the large cart after the collision
  Q. At each of the designated points, rotate the given vector to indicate the direction of the force exerted by the water on either the inside of fishbowl (for points A and B) or the outside …
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Two spherical shells have a common center
  Two spherical shells have a common center. A -2.8 10-6 C charge is spread uniformly over the inner shell, which has a radius of 0.050 m. A +5.5 10-6 C charge is spread uniformly over the out …
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