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

Question

asked Aug 12, 2021 125k views

1 Answer

Joe Edgar · Answer 1 · 2021-08-19T14:29:22+0000

Answer:

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 (
), 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.