or
of energy 'kilowatt-hour' (kWh). We can also convert this electrical energy into SI unit of energy called
joule by using the relation between kilowatt-hour and joule. Now, ta sri solo 2011. muod
1 kWh = 3.6 x 106 J
So,
3 kWh = 3.6 x 106 x 3 J
= 10.8 x 106 Joir (or 10.8 x 106 joules) o "r" er i tuorl-Hswold
Sample Problem 2. A current of 4 A flows through a 12 V car headlight bulb for 10 minutes. How much
energy transfer occurs during this time to a qui of Esqui mon gnidyris aleo Witole
Solution.
Energy = Power ® Times no gasolbre osig of gosig mot visvegler de
E = P x texa eleda vindbladen... (1) li galvd.wois
First of all we should calculate power P by using the current of 4 A and voltage of 12 V.
Now,
P = V XI
ODBORI SONO 200° tipistoote ori
So,
P = 12 x 4
wold ( 909 ) teoritoolbleu yo bomano
or, Power, P = 48 watts italogu Wormon siaga isitosis insolib
odotomis buvo tortals and
48
kilowattsomog osilgas iraila Bloon art
1000
Thus, Power, P = 0.048 kW a Isot ar 10 abracob liid toonbogla w 2017 Inarsi
And Time, t = 10 minutes of mig to sorteilqas to v tomuto tone
10 nagls to to 903 od adieb von lliw Witos
Toto vrlota ob sei in
hours
60
bloei vidols srlssoate boitos at
bo
sades a wode atinini gelbst od
1
mood sal dit to) od svolta hours
ursunod svog ort free blaorte sw'ait od moras
on tools torent
6 ST.0001 y enw slot ar antibiooti
1
Now, putting P = 0.048 kW and, t = hours in equation (1), we get : swallom barevno
6
and a gonilaca si bitiw sa aivot to toun
vilat how
E = 0.048 x
Hevolt bara
=
=
1
Answers
Answer:
It takes about 1 J to raise a 100-g-apple 1 m. Energy units can be preceded
by various factors, including the following:
kilo (k=103), Mega (M=106), Giga (G=109), Tera (T=1012), Peta (P=1015),
Exa (E=1018).
Thus, a kiloJoule (kJ) is 1000 Joules and a MegaJoule (MJ) is 1,000,000 Joules.
A related unit is the Watt, which is a unit of power (energy per unit time). Power units can be converted to energy units through multiplication by seconds [s], hours, [h], or years [yr].
For example, 1 kWh [kilowatt hour] = 3.6 MJ [MegaJoule]. With 1 kWh, about 10 liters of water can be heated from 20 ºC to the boiling point.
There are many other energy units besides the "Système International d'Unités (SI)". A "ton of coal equivalent" (tce) is frequently used in the energy business. 1 tce equals 8.141 MWh. It means that the combustion of 1 kg of coal produces the same amount of heat as electrical heating for one hour at a rate of 8.141 kW.