Lecture No. 4 Factor Label Method and Conversions 1. General
The factor label method carries along the dimensions, units, of the data as well as the numbers in a computation Purpose: To ensure the correct units have been employed: to assist in the conver
Lecture No. 6 Food Production 1. General
20 % of the world is "undernourished" which is an insufficient quantity of food. 60% of the world is "malnourished" which is an inadequate quality of food, such as proteins, vitamins or essential chemical elements
Lecture No. 10 Noise and Air Pollution Part I Noise 1. Sound and Hearing
Noise is unwanted sound Sound is caused by the presence of mechanical airwaves in matter. Sound waves are longitudinal-the atoms transmitting the wave oscillate in the direction tha
Lecture No. 9 Energy Electrical and Nuclear Part I Electrical Energy 1. Generating Capacity
Increasing 7% per annum Demand is NOT constant; hourly, daily and seasonal fluctuations
peak Electrical Usage total available capacity
reserve capacity
base deman
Lecture No. 1 Population Projections
1. General
Population forecasts depend on the amount and type of data available Population forecasts also depend on the resources available i.e. the amount of money that you are willing to spend. Forecasts are suscept
Lecture No. 2 Statistics
1. Mean
The arithmetic mean of a set of numbers, N, x1, x2,.,xN is denoted xbar. x bar =
Xj / N
j =1
N
Example: Given: The flow of a river is 8, 3, 5, 12, 10 cfs, cubic feet per second. Find: average x bar = x bar = x bar = x bar