Recent content by mm874

A horizontal pipe tapers uniformly from a diameter of 150mm to a diamter of 70mm and carries water (1000kgm3). The pressure at the wider diameter is 100kPA and the pressure at the smaller diameter is 60kPA. Calculate both velcoties at either end and the volume rate of flow.

So how do you calculate the unknowns if there is one either side. The pressure cannot be equal at both ends. As it state the faster the speed the lower the pressure.

Homework Statement The gauge pressure in a horizontal fire hose of diameter 5.4 cm is 3.0 x 105 Nm-2 and the speed of flow is 4.0 ms-1. The fire hose ends in a metal tip of diameter 2.5 cm. What are the pressure and the speed of the water in the tip? Homework Equations...

Sorry, I had already done that and am still struggling! This has croppped up on a number of past exam papers but we haven't been through it in class.

Homework Statement A ladder of weight 250 N and of length 6.0 m....? A ladder of weight 250 N and of length 6.0 m rests with its lower end on a horizontal rough concrete surface and its upper end against a smooth wall. If the ladder just starts to slip when the angle between it and the...

Homework Statement Water flows down a pipe which tapers from 200 mm diameter to 125 mm diameter at the lower end. The difference in height between the two ends of the pipe is 4.0 m and the rate of flow is 1.50 m3 min-1. Calculate the pressure difference between the upper and lower ends of...

Homework Statement A steam boiler produces steam at a rate of 0.5 kg.s-1. If the specific latent heat of vaporisation of water is 2.3 MJ kg-1: The boiler has a steel plate which is 6mm thick. The thermal conductivity of steel is 48Wm/s k/s. Calculate the temp drop across the boiler plates...