1 Explain that a population pyramid shows the age and sex structure of a population. 2  Point to the horizontal bars, which show the percentage (or the absolute number) of males and females in each age group. 3  Have students interpret the chart.
1 A small-to medium-capacity dehumidifier (11-25 pints) for a living room can run around $100-$250 or more, depending on size and features such as a humidistat to set the desired humidity, auto-shut-off when the tank's full, energy efficiency and quiet operation.
For example, letâs say you have a 500W dehumidifier (i.e. 0.5kW) and you run it round the clock for a whole day. The electricity used is 0.5 (kW) x 24 (hours) = 12kWh. If your electricity costs 15p per kWh (and price will vary depending on the tariff you are on) then this will cost 12 x 15 = 180p.Itâs costing nearly Â£2 a day to have the dehumidifier running constantly, so you can see how appliances can add a lot to your bills.lectricity is sold by the kilowatt-hour (kWh) â usually referred to as âunitsâ on your electricity bill. If youâre feeling mathmatical you can work out how much a particular appliance costs to run by multiplying its wattage by the amount of time itâs on and then by the cost of electricity per kWh.