If the power company sells electrical energy at $.11 per kilowatt how much does it cost to run a 100 w radio for three hours

The power company sells energy.  But "kilowatt" is not energy.  It's a RATE of using energy.  

Take a close look at your electric bill. The power company charges       $0.11 per "kilowatt-hour".  That's the energy you use in 1 hour if you're taking it at the rate of 1 kilowatt.

Remember that 1 watt means 1 Joule of energy per second.

So 1 kilowatt = 1,000 Joules per second, and

1 kilowatt-hour = (1,000 J/sec) x (3,600 sec/hr) = 3,600,000 J

= = = = =

Now for your radio . . .

(3 hours) x (3,600 seconds/hour) = 10,800 seconds

100 watts = 100 Joules/second

Energy used = (100 J/sec) x (10,800 sec) = 1,080,000 Joules

(1,080,000 J) x (1 kilowatt-hour/3,600,000 J) = 0.3 kilowatt-hour

(0.3 kilowatt-hour) x (11¢/kilowatt-hour) = 3.3¢  <==

= = = = =

Slightly different way:

(100 watts) x (3 hours) = 300 watt-hour

"kilo ..." means "1,000" of something, so

300 watt-hours = 0.3 kilowatt-hour

Cost = (11¢/kilowatt-hour) x (0.3 kilowatt-hour) = 3.3¢

object 2 because all the other ones are wrong

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force