Recent content by boyblair

Homework Statement In a particular application, the generator output is converted to DC and used to power an immersion element for water heating. 1). Sketch the shape of the output voltage at a rotation speed of 300 rpm assuming the amplitude on each phase is 30V? The Attempt at a...

Thanks for the advice. I have made another attempt. Area = 10x10 = 100cm2 or 10000mm2 E = Force applied x original length/area of cross section x change in length = 1700 x 100/10000 x 0.17 = 100 Mpa Not sure where I should use slope of straight line calculation.

Hello, having some problems with calculating young's modulus, please help. [b]1. A Strain gauge records the following strain when a block of material is pulled: Force(N) Strain(%) 100 0.01 1000 0.1 2000 0.179 3100 0.9 Area of block =...

Thanks for your help tiny-tim. I have made another attempt at the problem: Primary energy consumed in 1 year: 400h*53.75kw=21.5MWh Energy supplied to 95% efficient batteries: 21.5 x 100/20 x 100/95 = 113.2MWh For 300 miles: 300/10000*113.2=3.4MWh

Hey, thanks for the quick response. I have attempted part b) and would be grateful for any feedback. Primary energy consumes in 1 year: 300h*53.75kw=16.1MWh Energy into 20% efficient motor: 21.5MWh/20%=80.5MWh Energy supplied to 95% efficient batteries: 80.5MWh\95%=84.7MWh Many thanks

Hi everyone! I am having a bit of a problem solving the following question, and would be very grateful for any advice given. 1. Homework Statement A car is run for 400 hours per year, with a total mileage of 10,000 a year. The car uses diesel and consumes 2,000 litres per year. A...

Hi everyone! I am having a bit of a problem solving the following question (not good with maths), and would be very grateful for any advice given. Homework Statement A car is run for 400 hours per year, with a total mileage of 10,000 a year. The car uses diesel and consumes 2,000...