Answer:
I = 3.785 W/m²
Explanation:
given,
distance from the light, r = 1.45 m
Power of bulb = 100 W
The area is that of a sphere with a radius equal to the distance from the light bulb.
The formula for the area of a sphere of radius 1.45 meters is:
A = 4 π r²
A = 4 x π x 1.45²
A = 26.42 m²
Intensity of the light is equal to


I = 3.785 W/m²
Intensity of the light at 1.45 m is equal to I = 3.785 W/m²
His breakthrough was the Theory of Evolution.
Answer:

Explanation:
The distance traveled by the speeding car will be
, where
.
The distance traveled by the police car will be given by the formula:
, where
and
since it departs from rest, thus having
.
The police car will reach the speeding car when those distances are the same, or
, so we will have:

Which means:

This is the expression asked, but we can use our values:
