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A bridge is made with segments of concrete 94 m long (at the original temperature). If the linear expansion coefficient is 1.2 × 10-5 (C)-1, how much spacing is needed to allow for expansion for an increase in temperature of 69F?
A 900- kg car collides with a 1300- kg car that was initially at rest at the origin of an x-y coordinate system. What was the initial direction
Two packing crates of massesm1= 10.0kg and m2=7.00 are connected by a light string that passes over a frictionless pulley, Find the acceleration of the 7.00 kg crate
A violin string vibrates at 264 Hz when unfingered. At what frequency will it vibrate if it is fingered one fourth of the way down from the end
a 2.00-mol sample of a diatomic ideal gas expands slowly and adiabatically from a pressure of 5.02 atm and a volume of
Calculate the electric field at the center of a square 52.5 cm on a side if one corner is occuppied by a +45.0 uC charge and the other three are occupied by -27.0 uC charge
An airplane has a mass of 2.6 x10^6 kg, and the air flows past the lower surface of the wings at 95m/s. If the wings have a surface area of 1200m2, how fast should the air flow over the upper surface of the wing if the plane is to stay in the air?..
Identify the magnitude and direction of the electric field at a point midway between a -8.0 uC and a +5.8 uC charge 8.0 cm away. Assume no other charges are nearby.
A car is initially 4.0km south of a gas station and is moving with a constant speed of 55km/h due north. How far are the vehicles from the gas station when they pass each other
A 0.700 kg ball is on the end of a rope that is 1.30m in length.The ball and rope are attached to a pole and the entire apparatus,including the pole, rotates about the pole’s symmetry axis.The rope makes an angle of 70.0 degrees with respect to theve..
Two lightweight rods d = 30 cm are mounted perpendicular to an axle and at 180° to each other. What is the component of the total angular momentum along the axle
A 6-µF capacitor in series with a 2-? resistor is charged with a 9-V battery for a long time by closing the switch, Determine the maximum current through the inductor
Jack was exposed to fast neutrons; he received a radiation dose of 280rem on part of his hand, affecting 30.0grams of tissue. What was the total energy of the radiation Jack received
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