Posted by **claire** on Monday, February 8, 2010 at 6:52pm.

The brightness of a light bulb varies inversely as the square of the distance from the source. If a light bulb has a brightness of 300 lumens at 2 ft, what will its brightness be at 10 ft?

## Answer this Question

## Related Questions

- math - The brightness of a light bulb varies inversely as the square of the ...
- physics - You are in the lab with a 10 V battery. You have a 10 W light bulb and...
- college physics - You are in the lab with a 10 V battery. You have a 10 W light ...
- Math - the intensity l of light from a light bulb, measured in watts per square ...
- math - The intensity of I of light from a light bulb, measured in watts per ...
- Physics - The brightness of a light source at a distance of 100m from the source...
- Math - A variable star is one whose brightness alternately increases and ...
- algebra - The intensity I of light bulb measured in watts per square meter (w/m^...
- Physics - What happens to the brightness of light emitted by a light bulb when ...
- science - what is an explanation for the relationship between currents and the ...

More Related Questions