I
iTeachChem•3mo ago
Sephrina

Energy efficency

i tried it out and the ans should be 25 and im getting in 10 power soo i think the way is wrong in this one
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30 Replies
iTeachChem Helper
iTeachChem Helper•3mo ago
@Dexter
iTeachChem Helper
iTeachChem Helper•3mo ago
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.
Sephrina
SephrinaOP•3mo ago
que 133 and sun's energy efficency is 1kW per square meter
Nimboi [ping if answering]
1 kWh = 3.6 * 10^6 joules per day The sun delivers 1000 joules per square meter per second The energy that gets converted by the panels = 19% of that = 190 joules per square meter per second = 5.4 * 10^6 joules per square meter per day (considering an 8 hour day) now just divide the required 3.6 * 10^6 by 5.4 * 10^6 to get the area required did i mess up the calculations? is the answer supposed to be below 1
Sephrina
SephrinaOP•3mo ago
tht gives 0.6 right
Nimboi [ping if answering]
uh huh
Sephrina
SephrinaOP•3mo ago
but ans is 25
Nimboi [ping if answering]
💀 lemme recheck
Sephrina
SephrinaOP•3mo ago
nope it is 25m square
Nimboi [ping if answering]
sorry im goofy the houses use 40kWh not one that's = 1.44 * 10^8 joules
Sephrina
SephrinaOP•3mo ago
yh they do lmao thts ok
Nimboi [ping if answering]
divide that by the 5.4 * 10^6 joules that we actually get from the sun that gives around 25
Sephrina
SephrinaOP•3mo ago
yup tht gives 26.3 got it
Nimboi [ping if answering]
bet also zumdahl?
Sephrina
SephrinaOP•3mo ago
ys
Nimboi [ping if answering]
what chem chapter is this this is physics
Sephrina
SephrinaOP•3mo ago
thermochemistry
Nimboi [ping if answering]
oh 💀 makes sense
Sephrina
SephrinaOP•3mo ago
chp 6
Nimboi [ping if answering]
there was no chemistry involved
Sephrina
SephrinaOP•3mo ago
lmao true maths pure maths
Nimboi [ping if answering]
my beloved
Sephrina
SephrinaOP•3mo ago
it felt like those ques with raju bought 100 mangoes
Nimboi [ping if answering]
:kekw:
Sephrina
SephrinaOP•3mo ago
one costs blah blah
Nimboi [ping if answering]
it was that pretty much
Sephrina
SephrinaOP•3mo ago
i got confused in units im just a kid
Nimboi [ping if answering]
u literally about to be an adult think about that for a second
Sephrina
SephrinaOP•3mo ago
im 16 only +solved @Nimboi [ping if answering]
iTeachChem Helper
iTeachChem Helper•3mo ago
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