To calculate all the breaths you take in a lifetime we have to know a couple of things. First of all we have to know the size (volume) of an average breath. Secondly we have to know how frequent we breathe (number of breaths per minute).And finally we have to decide how long you are going to live.o calculate all the breaths you take in a lifetime we have to know a couple of things. First of all we have to know the size (volume) of an average breath. Secondly we have to know how frequent we breathe (number of breaths per minute). And finally we have to decide how long you are going to live.
Step #1: Make the slingshot. 1  Make elastic bands. 2  To begin, tie 2 rubber bands together to make a long band. 3  Make a pocket. 4  Cut a small rectangle out of a scrap of leather or sturdy cloth. 5  Assemble. 6  Tie the rubber bands to the ends of a forked stick.
There is only one way to know for sure what shot pattern to expect from a specific shotgun. Create a target from a 30-inch or larger piece of paper. Stand 40 yards away and point and shoot at the center of your target. Repeat this with different shotshell brands and different shot sizes.