Answer:
1.42 KJ
Step-by-step explanation:
solution:
power in beginning
=(1.5 V).(9×
A)
= 13.5 mW
after continuous 37 hours it drops to
=(1 V).(9×
A)
=9 mW
When the voltage will drop energy will not remain the same but the voltage drop will always remain same if the voltage was drop to for example from 5 V to 4.5 V the drop will remain the same.
37 hours= 37.60.60
=133200 s
w=(9×
A×133200 )+
=1.42 KJ
NOTE:
There maybe a calculation error but the method is correct.