Question

help? medal c:

Answer 1

40. Physics; For a 225-watt bulb, the intensity I of light in lumens at a distance of x feet is I=225/x^2 .

a. What is the intensity of light 5ft from the bulb?

b. Suppose your distance from the bulb doubles. how does the intensity of the light change? Explain.

Answer 2

that is for a only..............

Answer 3

oh ok !

Answer 4

for b, use 20 instead of 10 and explain how many times larger the result is.....

Answer 5

so 20/102?

Answer 6

huh?