a. Air at 700 kPa and 15°C is used to power a pneumatic breaking hammer for road repairs. If the volume of the air increases by a factor of 6 in the hammer, what is its temperature when it is vented?...


a. Air at 700 kPa and 15°C is used to power a pneumatic breaking hammer for road repairs. If the volume of the air increases by a factor of 6 in the hammer, what is its temperature when it is vented? (Assume ideal gas and no heat loss.)


b. A pulse of ultrasound takes 1.1 × 10−4
s to travel through a concrete wall 400 mm thick. If the Poisson’s ratio of the concrete is 0.15, and the density is 2400 kg/m3, what is the Young’s modulus?

Nov 21, 2021
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