\p Andy Darvill 6/B  dMbP?_"*+%,1 Arial1 Arial1 Arial1 Arial1 Arial1 Arial1 h Arial1  Arial1 Arial1 Arial1  Arial1  Arial1 Arial1 Arial1  Arial1 Arial1  Arial1 Arial1  Arial1 Arial1  Arial1  Arial1 Arial1  Arial1 Arial1 Arial1  Arial1 Arial1  Arial1  Arial1 Tahoma&RAJD SCIENCE DRIVE M:\&F &D&M&d2?'M&d2?(\(\?)M&d2?M  d,," d,,??@V General00.00#,##0 #,##0.00 #,##0;\-#,##0#,##0;[Red]\-#,##0#,##0.00;\-#,##0.00#,##0.00;[Red]\-#,##0.00""#,##0;\-""#,##0""#,##0;[Red]\-""#,##0""#,##0.00;\-""#,##0.00!""#,##0.00;[Red]\-""#,##0.000%0.00% 0.00E+00 #\ ?/? #\ ??/?? dd/mm/yy dd\-mmm\-yy dd\-mmm mmm\-yy h:mm\ AM/PMh:mm:ss\ AM/PMhh:mm hh:mm:ssdd/mm/yy\ hh:mm ""#,##0.00 ##0.0E+0mm:ss@30_-""* #,##0_-;\-""* #,##0_-;_-""* "-"_-;_-@_-*'_-* #,##0_-;\-* #,##0_-;_-* "-"_-;_-@_-;8_-""* #,##0.00_-;\-""* #,##0.00_-;_-""* "-"??_-;_-@_-2/_-* #,##0.00_-;\-* #,##0.00_-;_-* "-"??_-;_-@_- -4cC C  C  C  C  C C C C C C C C C C C  C " C  C ! C  C  C  C  C  C  C AC AC C C C C  C  C C C C C  C AC C  C  C  C C  C  C  C  C  C  C &C &C  C  C  C !C &C  C "C  C "C !C  C  C &C &C &C &C &C &C #C  C  C !C  C  C  C  C  C  C  C !C  C  C !C  AC  AC  AC  C  C  C !C "C  C  C  C  C  C !AC  AC &AC &C  C  AC  AC !C  AC &AC &C  C  C "C "C  C  C  C  C  C  AC  AC  C  C  C !C  C "C !C  C  U} m7} m 0}  0} $ 0} m0}  0} $ 0} m 0} $ 1} $ 0 6iX@ ;2`>:   0  ~ xq 04tFs [00~0z0r;(a,Fvm/2KS4 Electricity Costs3,*$Name________________________________455+ Date ___________688888\9TLook at the table, then answer the questions. The first ones have been done for you.: Appliance;Power(W)< Power(kW)=60 Watt Light Bulb~ 0N@~ >@=100 Watt Light Bulb~ 0Y@~ ?$@&@Power is measured in Watts (W)AAB%=20 Watt Low Energy Light Bulb~ 04@~ ?@'CA "kiloWatt" (kW) is 1000 WattsDDE" F(gives same light as 100W) ? = Television~ 0@Z@~ ?%@0 G(Remember that a "unit" of electricity is 5 5 H =Portable Television~ 0D@~ ?@! Icalled a "kiloWatt-hour". J J K =Electric Fan heater~ 0@@~ ?@3 L+This is the amount of electricity used by a 1 1 M =Fridge~ 0Y@~ ?$@( L 1000 Watt appliance in one hour. 1 1 M=Garden Floodlight~ 0@@~ ??-L%So a 2000 Watt heater will use 1 unit11M=Electric Kettle~ 0@~ ?n@Lin half an hour.11M=Video recorder~ 0>@~ ?@4N,A 100 Watt bulb will use 1 unit in 10 hours.OOPQ Hi-Fi System~ Ri@~ S4@T11T4U,Units used = power (in kW) x time (in hours)VWWWXTYZXXXXe[]If you type the formula "=0.1*24" into the first answer box, the computer will do it for you!1T11: power(kW): time(hours) \UnitsDT<1) How many units will a 500 Watt floodlight use in 4 hours?11~ ]?~ ^@_@ DD@T82) How many units will a fridge use each day (24 hours)?11~ `$@~ G8@DT<3) How many units will a Hi-Fi system use in a 5 hour party?11<T44) How many units will a portable TV use in 8 hours?11,-)11117b/Electricity costs 8 pence per unit (0.08), cddbdee e f f f fffff0gggggg@h8So Cost (in pence) = 8 x power (in kW) x time (in hours)WWWWWi3j+in other words, cost (in pence) = units x 8WkkkllJ J J J J JJJJJ m" #vt0$t0%&x '( )* +,P-hP.W/\ 001@2] 3T0405 l l l l l J J J J J J J J J J"T"1"1"1"n"o power(kW)"o time(hours)"p cost (pence)G#T?5) What will it cost to run a 20W low energy bulb for 10 hours?#1#1#1#n~ #q@~ #r$@~ #sd@#1# 1# 1# 1# 1# 1#1#1#1#1C$T;6) What will it cost to run a 100W light bulb for 10 hours?$1$1$1$n~ $]$@~ $u$@$.$1$ 1$ 1$ 1$ 1$ 1$1$1$1$1>%T67) Video recorders are left plugged in 24 hour a day. %1%1%v%w%%%&S&TK What is the cost of this over 1 month (30 days, 24 hours a day)?&1&1&1&n&&&$&1& 1& 1& 1& 1& 1&1&1&1&1N'TF8) A kettle is used for 6 minutes each day (that's 1/10th of an hour).'1'1'1'n''''6(T. How much would that cost each week?(1(1(1(n(( ((=)T59) For how long could you run a 2000W heater, if you )1)1)1)n)!)")y7*T/ wanted to spend no more that 1.60 ?*1*1*1*n*#*$~ *zd@+{+|+|+|+|+|+|+|,i,m,m,m,m,m,m,m -}Extra-m-m-m-m-m-m-mX.7P10) A 100 Watt light bulb costs 50p to buy. A 20 Watt low energy bulb costs 10.Y/7Q What would be the TOTAL cost of buying and then running each bulb for 8 hours/` Low energy/`Normal(07 a day for 1 month (30 days)?0%0%Y17Q11) What would be the TOTAL cost of buying and then running each bulb for 8 hours(27 a day for 1 year (365 days)?2` Low energy2`Normal3%3%64~.12) So which bulb is cheaper in the long term?4444444]&B6!]&`]&\paswword = andy= ij,>   "