Sunday, February 1, 2009
YAY ! This is my first on my physics blog . This is the first topic and the solution to it .
Topic 1:
To appreciate our limited water resources, you are given a map that shows the MacRitchie reservoir. How do you estimate the volume of water available during the dry season when the average depth of water is 2.5m ?
Solution 1:
Area of cuboid = Length x Breadth x Height
1cm --- 60 000cm
Depth: 250cm
Length: 120 000cm
Breadth: 84 000cm
250 x 120000 x 84000
= 2520000000000 cm
= 2520000000000ml= 25.2 giga ml
*NOTE: 1ml = 1cm (http://www.unitconverters.net/)
This is the method taught , there is another method , the ticking method , but if you compare the method taught to the ticking method , the ticking method would be too tedious . So , the method taught would be much easier :D
Solution 2:
Area of cylinder: π x radius x radius x height
radius : 125cm
radius : 125cm
height : 15000cm
π: 3.14
3.14 x 125 x 125 x 15000
=7359375 thousand ml
*NOTE: 1ml = 1cm (http://www.unitconverters.net/)
This is the method taught , there is another method , the ticking method , but if you compare the method taught to the ticking method , the ticking method would be too tedious . So , the method taught would be much easier :D
what we could have been, 3:38 AM.
