Asection of a two-lane highway (12-ft lanes) is designed for 75 mi/h. at one point a vertical curve connects a -2.5% and +1.5% grade. the pvt of this curve is at station 36+50. it is known that a horizontal curve starts (has pc) 294 ft before the vertical curve’s pvc. if the superelevation of the horizontal curve is 0.08, the side friction is 0.09 and the central angle is 38 degrees. what is the radius of the horizontal curve?

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

Which of the following refers to refers to how well the control system responds to sudden changes in the system. a)-transient regulation b)- distributed regulation c)-constant regulation d)-steady-state regulation

Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]