Is it illegal for me to walk around with a concealed gun at 15 years of age or not?

yes if you have a permit and the area allows guns; no if you dont have a permit and or if the area your in allows guns.

Explanation:

it depends if you have a permit, and or if the area your walking around in permits any gun.

WHY DO YOU NEED TO KNOW THIS?(btw its common sence).

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.

heat the gas and measure the pressure