Respuesta :
Answer:
A 100-watt light bulb takes 100 seconds to use 10,000 J of electrical energy.
Explanation:
Power refers to the amount of work done (or energy consumed) per unit of time. It is usually measured in watts (W), which is equal to 1 Joules per second ([tex]\frac{J}{s}[/tex])
So, by definition, to calculate the power consumed or supplied in a time interval the following expression is used:
[tex]P=\frac{W}{t}[/tex]
where P is the power measured in Watts, W is the work measured in Joules, and t is the time measured in seconds.
In this case:
- P=100 Watt
- W= 10,000 J
- t= ?
Replacing:
[tex]100 Watt=\frac{10,000 J}{t}[/tex]
Solving:
[tex]t=\frac{10,000 J}{100 Watt}[/tex]
t=100 seconds
A 100-watt light bulb takes 100 seconds to use 10,000 J of electrical energy.
The time taken by a 100 watt light bulb to use 10,000 J of electrical energy will be:
"100 seconds".
Electrical energy
According to the question,
Power, P = 100 Watt
Work done, W = 10000 J
We know the relation,
→ Power (P) = [tex]\frac{Work \ done (W)}{Time (t)}[/tex]
or,
The time taken will be:
→ t = [tex]\frac{W}{P}[/tex]
By substituting the above values, we get
= [tex]\frac{10000}{100}[/tex]
= 100 seconds
Thus the approach above is appropriate.
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