How does the energy used by a 100 W lightbulb compare with the energy used by a 40 W lightbulb in a given amount of time? The 10

Question

4 years ago

9

How does the energy used by a 100 W lightbulb compare with the energy used by a 40 W lightbulb in a given amount of time? The 10

0 W bulb uses 2.5 times more energy. The 40 W bulb uses 2.5 times more energy. The 100 W bulb uses 60 times more energy. The 40 W bulb uses 60 times more energy.

Physics

2 answers:

aleksandrvk [35] · Answer 1 · 2022-01-21T20:34:12+03:00

aleksandrvk [35]4 years ago

8 0

Answer:

The 100 W bulb uses 2.5 times more energy

Explanation:

just took the test

MatroZZZ [7] · Answer 2 · 2022-01-21T19:03:18+03:00

The correct answer is
<span>The 100 W bulb uses 2.5 times more energy

In fact, the power is the amount of energy used per unit of time. This means that the light bulb of 100 W uses 100 J in one second, and the light bulb of 40 W uses 40 J in one second, and if we compare the two numbers, we get
</span> $\frac{100 J}{40 J}=2.5$
<span>so, the 100 W light bulb uses 2.5 times more energy than the 40 W light bulb.</span>