Saline solution is a mixture of sodium chloride and water and has a number of uses in medicine. when administered via an iv drip it can be an effective treatment for dehydration. a cylindrical bag, as shown below, of radius 10 cm and height 50 cm contains saline solution that is provided to a patient as an iv gravity drip. a gravity drip is used to infuse the solution into the patient's blood stream. the solution flows downwards into a hole of 1 mm at the bottom of the bag. the only resistance presented is the viscous resistance through the tubing. determine the time it will take for the bag to empty by 90%.

An engine runs on the ideal diesel cycle. the cycle has a compression ratio of 20 and a cutoff ratio of 2. the highest temperature in the cycle is 1200 k. if the heat into the system is 300 kj/kg of working fluid and using variable specific heats determine the work produced per mass of working fluid

The maximum shear stress and maximum flexural stress occur at the same location along a beam subjected to a non-uniform bending load. a)-trune b)- false

Determine the time of the day and month of the year at which the peak sensible cooling load occurs for a top floor, north-eastern corner room of an office building in durban for the following conditions: floor area: 8 x 8 x 3 m east and north walls: 115 mm face brick (outside), 20 mm air space, 115 mm ordinary brick (inside) with 15 mm plaster roof construction: suspended plasterboard ceiling, 450 mm air space, 150 mm concrete, 75mm screed, waterproofing no heat transfer across other surfaces window area 3x 1,5 m high in north wall only. ordinary glass with venetian blinds. lights and occupants : from 07: 00 to 18: 00 average light density: 25 w/m2 number of occupants : 5 seated, light office work room temperature 24°c