Question

How much work is done by a 35-watt light bulb if it is on for 1,320 seconds?

plz help i need to do good on this test

Answer 1

The 35-watt light bulb does a work of 46200 joules in 1320 seconds.

Step-by-step explanation:

From Physics we remember the definition of work (
`W`), measured in joules, by the following integral equation:

`W = \int\limits_(0)^(t) {\dot W} \, dt` (1)

Where
`\dot W` is the power, measured in watts.

If the power is stable in time, then the work can be calculated by the following algebraic equation:

`W = \dot{W}\cdot \Delta t` (2)

If we know that
`\dot W = 35\,W` and
`\Delta t = 1320\,s`, then the work done by the 35-light bulb is:

`W = (35\,W)\cdot (1320\,s)`

`W = 46200\,J`

The 35-watt light bulb does a work of 46200 joules in 1320 seconds.