I was not happy with this mark. I believe that if I had more time to complete this task I would have reached a higher mark.
I am happy with my mark although I should have studied a bit more for the experimental design section.
The effectiveness of furniture polish at keeping germs at bay.
Effectiveness = 30%
I have to pay $11.75 for using the PlayStation 3 for 2 hours a day for every day in a year. To find this I first found the wattage of a ps3 which is 70. The electricity cost is 23 cents/kwh. Running time per day is 2 hours. Per year is 2 x 365 so per year is 730 hours. 730 hrs x 70w equals 51,100. 51,100 divided by 1000 is 51.1 kwh. 51.1 x 23 cents equals 1,175 cents divided by 100 equals $11.75 per year.
What is the relationship between voltage and current? Ohm's law applies to electrical circuits; it states that the current through a conductor between two points is directly proportional to the potential difference or voltage across the two points, and inversely proportional to the resistance between them. Or simply V = I*R Note that Ohm's law apply only to ohmic materials i.e. Materials which obey ohm's law. Not all materials follow this V = I*R relationship. Ref: http://answers.yahoo.com/question/index?qid=20090420163630AAFGtrK