\pPre-installed User 6B  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  Arial&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 &xC &xC  C  C "8C !0C #8C  C  C  C  C  C  C  C  C  C  (C  C  C !0C  C &XC  @C !PC  C  `C &8C &8C &8C &8C &8C &8C !XAC &XAC  (C  C &XC  HAC  HAC  @AC  HAC  C !PC  @C  C "8C  C  C  C !0C  `AC  `AC !xC  `C  hAC  hAC "8C  hC  hC  HC  $C  (C  ,C "8C  (C  C &XAC  C  ,C "XC  C  C  C  C AC AC C C C C  C  C C C C C  C "8C AC C  C  $C  $C  C  ,C !0C  C  C  (C  (C  C  HAC  (C  (C &8VVVC &8VVC &8VVVU} mVV} m VV}  VV} $ VV} mVV}  VV} $ VV} m VV} $ !VV 6Xg 0J\n`>:b   0  ~t @xq 04tF [00b00;(9,Fv,cY[Available as sheet (consumable/non-consumable as appropriate) AND on network - see filenameKS4 Electricity Costs,|$Name________________________________} ANSWER SHEET Date ___________0~(inappropriate cels locked. Password=andy\BTLook at the table, then answer the questions. The first ones have been done for you. Appliance&Power(W)C Power(kW)60 Watt Light Bulb~ N@~ D@100 Watt Light Bulb~ Y@~ E$@&0Power is measured in Watts (W)112%20 Watt Low Energy Light Bulb~ 4@~ E@'3A "kiloWatt" (kW) is 1000 Watts445" (gives same light as 100W) E  Television~ @Z@~ E%@0 (Remember that a "unit" of electricity is    Portable Television~ D@~ E@! Jcalled a "kiloWatt-hour". / / K Electric Fan heater~ @@~ E@3  +This is the amount of electricity used by a ! ! " Fridge~ Y@~ E$@(  1000 Watt appliance in one hour. ! ! "Garden Floodlight~ @@~ E?- %So a 2000 Watt heater will use 1 unit!!"Electric Kettle~ @~ En@ in half an hour.!!"Video recorder~ >@~ E@4#,A 100 Watt bulb will use 1 unit in 10 hours.$$%G Hi-Fi System~ ?i@~ F4@)!!)4L,Units used = power (in kW) x time (in hours)M<<<Q)OPQQQQ)!!)!! power(kW) time(hours) UUnitsD)<1) How many units will a 500 Watt floodlight use in 4 hours?!!~ (?~ W@V@ DD@)82) How many units will a fridge use each day (24 hours)?!!~ *$@~ 8@\433333@ DDD)<3) How many units will a Hi-Fi system use in a 5 hour party?!!~ ^4@~ _@]? DD<)44) How many units will a portable TV use in 8 hours?!!~ x@~ y @z{Gz? {Gz?!!!!76/Electricity costs 8 pence per unit (0.08), ;7767:: : 8 8 8 88888======@>8So Cost (in pence) = 8 x power (in kW) x time (in hours)<<<<<-3{+in other words, cost (in pence) = units x 8<XXX++/ / / / / ///// ," #v0$0%&' ' b( )* +,Pt-hP@.W/\0012] 3T04z05 + + + + + / / / / / / / / / /")"!"!"!"."N power(kW)"N time(hours)"m cost (pence)G#)?5) What will it cost to run a 20W low energy bulb for 10 hours?#!#!#!#.~ #S@~ #T$@~ #sd@#!# !# !# !# !# !#!#!#!#!C$);6) What will it cost to run a 100W light bulb for 10 hours?$!$!$!$.~ $($@~ $R$@~ $t @$!$ !$ !$ !$ !$ !$!$!$!$!>%)67) Video recorders are left plugged in 24 hour a day. %!%!%H%I%`%a%nS&)K What is the cost of this over 1 month (30 days, 24 hours a day)?&!&!&!&.~ &b@~ &c@~ &k@&!& !& !& !& !& !&!&!&!&!N')F8) A kettle is used for 6 minutes each day (that's 1/10th of an hour).'!'!'!'.'d'e'o6(). How much would that cost each week?(!(!(!(.~ (fn@(gffffff? (pzG*@ D(D(=))59) For how long could you run a 2000W heater, if you )!)!)!).)h)i)q7*)/ wanted to spend no more that 1.60 ?*!*!*!*.~ *j@~ *k$@#*r? {Gz?+@+A+A+A+A+A+A+A,-,,,,,,,,,,,,,, -[Extra-,-,-,-,-,-,-,X.P10) A 100 Watt light bulb costs 50p to buy. A 20 Watt low energy bulb costs 10.Y/Q What would be the TOTAL cost of buying and then running each bulb for 8 hours/* Low energy/*Normal(0 a day for 1 month (30 days)?60lS㥛$@${Gz?{Gz? <0l](\@*?{Gz??Y1Q11) What would be the TOTAL cost of buying and then running each bulb for 8 hours(2 a day for 1 year (365 days)?2* Low energy2*Normal63ZMbX-@${Gz?m{Gz? <3Z^(7@*?m{Gz??64u.12) So which bulb is cheaper in the long term?4v4v54w-Low energy (becomes cheaper after ~ 6 months)4v4v4v4v]&B6!]&`]&\= ij,> ***"