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Assume all temperatures to be exact, and neglect significant figures for small changes in dimension. Concrete highway slabs are poured in lengths of 9.00m. How wide should the expansion gaps between the slabs be at a temperature of 15degreeC to ensure that there will be no contact between adjacent slabs over a temperature range of -25 degreeC to 50degree C ?
a copper alloy has a young's modulus of 1.3 *10^11 Pa and density of 9.40 * 10^3 Kg/m^3. what is the speed of sound in a thin rod made from alloy
Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 5.4 m/s2 for 4.7 seconds. What is the acceleration of the yellow car
You are holding a bulletin board weighing 9.46 N in place against a wall while your friend secures it to the wall. How large must this force be if the coefficient of static friction with the wall is 0.37
A 4.0-m-long iron bar of uniform cross section is held perpendicular to the wall by a wire from the end of the bar to the wall. what is the magnitude of the horizontal component of force produced by the wall
A 6.50 g bullet moving at 726 m/s strikes a 590 g wooden block at rest on a frictionless surface. What is the speed of the bullet-block center of mass
A light beam having a wavelength of 654 nm in air is directed into glycerine (n=1.47). What is the frequency of light in glycerine
A storage tank at STP contains 18.5kg of butane gas, C4H10, Determine the number of moles of butane gas
how far will the bullet penetrate the block of wood.
A football player carrying the ball runs straight ahead at the line of scrimmage and directly into a wall of defensive linemen. Find the magnitude and direction of his average acceleration
A block of wood floats on water. 80% of the wood is submerged in water. Now a layer of oil is carefully poured on top of the water to a depth that more than covers the block. what is the density of the oil
By what percent must one increase the tension in a guitar string to change speed of waves on the string from 327 m/s to 376 m/s.
In a very busy off-campus eatery one chef sends a 239-g broccoli-tomato-pickle-onion-mushroom pizza sliding down the counter from left to right at 1.79 m/s. n what direction does the delectible dish move, if it moves at all
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