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In a materials testing laboratory, a metal wire made from a new alloy is found to break when a tensile force of 90.8 N is applied perpendicular to each end. If the diameter of the wire is 1.74 mm, what is the breaking stress of the alloy?
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Stress on a Mountaineer's Rope. A nylon rope used by mountaineers elongates 1.60 m under the weight of a 65.0-kg climber. If the rope is 55.0 m in length and 7.0 mm in diameter, what is Young's modulus for this material?
An 8.11-kg point mass and a 15.1-kg point mass are held in place 50.0 cm apart. A particle of mass m is released from a point between the two masses 20.0 cm from the 8.11-kg mass along the line connecting the two fixed masses. Find the magnitude and direction of the acceleration of the particle.
You hold a 23.5-kg car tire in your hand and, standing in place, rotate the tire in a horizontal circle of radius r = 1.10 m starting from rest. What is the time required to complete three full revolutions
A 25 g glass tumbler contains 410 mL of water at 24 °C. If two 20 g ice cubes each at a temperature of -3 °C are dropped into the tumbler
question1an old oaken buck of mass 6.75 kg hangs in a well at the end of a rope. the rope passes over a frictionless
The highest recorded waterfall in the world is found at Angel Falls in Venezuela. Its longest single waterfall has a height of 807 m. what is the maximum temperature of the water
As you stand by a railroad track a train passes with its whistle blowing.
The density of charge-carrying electrons in copper is 8.5 × 1028 electrons m?3, its resistivity is 1.72 × 10-8 ?·m, and the drift speed is 2.80 × 10-3 m/s. At what rate must thermal energy be carried off by a cooling medium
You throw a ball straight up with an initial velocity of 18.0 m/s. It passes a tree branch on the way up at a height of 7.00 m. How much additional time will pass
q1. the magnitude of f is 384 newtons and it points at 344o measured counter clockwise from the positive x-axis. what
A dockworker applies a constant horizontal force of 70.0N to a block of ice on a smooth horizontal floor. how far does the block move in the next 4.50s
a 84.0 nF capacitor is charged to 12V, then disconnected from the power supply and connected in series with a coil that has L=0.042 H and negligible resistance. what is the magnitude of the current in the inductor
find at least five internet or magazine articlesadvertisements which depict an exercise or health myth. why do you
Consider the triangle of charges diagrammed below, for which d = 2 cm, q = 2 nC, and the +x-axis points to the right. What is the force on the 1 nC charge? Give your answer as a magnitude and a direction.
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