If, at a given distance from a straight, two-lane road of infinite extent, zero grade, and negligible truck traffic, the maximum equivalent sound level is to remain constant, find the ratio of the maximum vehicle flow rate (Q) if the maximum speed is reduced from 104 km/h (65 mph) to 88 km/h (55 mph).

A weir is a barrier across the width of a river used to change the flow characteristics.Consider a rectangular weir of height h placed downstream in a river of height D, whereD > h. Use conservation of mass flow and Bernoulli’s equation for the surface streamlineto show that the water level drops at the weir.

An air compressor increases the pressure (Pout > Pin) and the density (?out > ?in) of the air passing through it. For the case in which the outlet and inlet diameters are equal (Dout = Din), how does average air speed change across the compressor? In particular, is Vout less than, equal to, or greater than Vin? Explain.

A pump raises 650 tonnes of pure water a height of 55m in 6 hours. If the pump efficiency is 100%, what is the power required to drive the pump?

A pump 260mm suction pipe and a 150mm discharge pipe is used to deliver 58L/s of water. The suction gage reads 15.6 kPa vacuum and the discharge gage located 120 cm above the suction gage which reads 110 kPa gage. Determine: a. The total dynamic head (TDH) in meters b. The water power in kW c. The pump efficiency in % if the power supplied by the motor is 15hp

The water level h(t) in a tank is controlled by an open-loop system as shown below. An armature- controlled DC motor turns a shaft that opens/closes a valve. The inductance of the armature circuit is negligible: Lo=0. Also, the rotational friction of the motor shaft and the valve is negligible. The height of the water in the tank is given by: h(t) = S[1.60(t) – h(t)]dt. The motor torque constant K=10 and the inertia of the motor-valve assembly is J=6x10³ kg-m?. (a) Determine the differential equation for h(t) and v(t). (b) Determine the transfer function H(s)/V(s). Amplifier 10 0 k- 50 Motor TL Valve

A vertical jet of water thru a nozzle supports a load of 150 N. The velocity and diameter of the jet at the nozzle tip are 17.46 m/s and 3 cm. Find the distance of load from the nozzle tip in meters.

could you please help me calculate the maximum height of the jet , Hj in metres please

Water flows through a vertical contraction (venturi) section. Piezometers are attached to the upstream pipe and minimum area section as shown. The velocity in the pipe is 3 m/s. The difference in elevation between the two water levels in the piezometers is 3 cm. The water temperature is 10oC. What is the velocity (m/s) at the minimum area?

An industrial fan delivers 55,000 CFM of air through a discharge duct with a size of 3 ft x 4 ft where the static pressure is 6-inch water gage. At the inlet, the duct diameter is 4 ft and the static pressure is 1-inch water gage. The temperature of the air is 78 F and barometric pressure is 14 psia. (ρw = 62.2 lb/ft³). Determine: a). the total pressure in feet of air b). the static power in HP c). the fan power in HP