Suppose the maximum safe average intensity of microwaves for human exposure is taken to be 1.00 w/m2. if a radar unit leaks 10.0 w of microwaves (other than those sent by its antenna) uniformly in all directions, how far away must you be to be exposed to an average intensity considered to be safe? assume that the power spreads uniformly over the area of a sphere with no complications from absorption or reflection.

at r= 0.56 m far away must you be to be exposed to an average intensity considered to be safe

Explanation:

The maximum safe average intensity of microwaves for human exposure is taken to be 1.00 W/m^2

heat leaked by radar P= 10.0 W

uniformly in the all directions.

Intensity at a distance a r is given by

for safe exposure I= 2.5 W/m^2

and P= 10 W

on calculating we get

r= 0.56 m

at r= 0.56 m far away must you be to be exposed to an average intensity considered to be safe

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2