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A 45.6 g sample of a conducting material is all that is available. The resistivity of the material is measured to be 1.30×10-7 ?m and the density is 6.38 g/cm3. The material is to be shaped into a solid cylindrical wire that has a total resistance of 1.27 ?. a) What length is required? b) What will be the diameter of the wire?
A horizontal circular platform rotates counterclockwise about its axis at the rate of 0.875 rad/s. You, with a mass of 72.3 kg, Calculate the total angular momentum of the system.
A block with a mass of 8 kg is at rest on a horizontal surface. The coefficiant of static friction between the block, What is the magnitude of the frictional force on the block
A "diving bell" is a tube or pipe that is closed at the top and open at the bottom. It is lowered into a body of water with the open end down so that air is trapped inside, Find the absolute pressure of the air in the bell
suppose the sun collapsed into being a neutron star of radius 12.0 km, without losing any mass. calculate the ratio of the escape velocity from the surface
q1. a 370-kg sailboat has an acceleration of 0.87 ms2 at an angle of 64deg north of east. find the magnitude and
an inductor that has a resistance of 40 ohm is connected to an ideal battery of 224V. Calculate the inductorace
A block is released from the top of a frictionless incline plane as pictured above. calculate how fast it is moving at the bottom using Conservation of Energy
Intensity level prooduced by a jet airplane at a certain location is 150 dB. find the intensity of the sound wave generated by the jet
A river flows due east at 1.20 m/s. Aboat crosses the river from the south shore to the north shore by maintaining a constant velocity of 12.0 m/s due north relative to the water. What is the velocity of the boat relative to shore?
Carbon disulfide (CS2) has a vapor pressure of 300 Torr at room temperature, estimate the average time between collisions that the gas is experiencing inside the test chamber
assume the roller coaster (h1 = 32 m, h2 = 11 m, h3 = 20) passes point A with a speed of 3.50 m/s. If the average force of friction is equal to one fifth of its weight, with what speed will it reach point B? The distance traveled is 30m.
Suppose you could pack neutrons (mass = 1.67 × 10-27 kg) inside a small ball of radius 0.026 m in the same way as neutrons, Approximately how many neutrons would fit inside the ball
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