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.
Part 2 of 6: Holding and Placing the Shot Put. 1. Hold the shot put at the base of your fingers instead of in your palm, with your fingers slightly spread apart. 2. Bend your hand back in a cocked position. 1  Imagine that you are balancing a tray or pizza box. 2  Your hand should be steady, but not over-extended, as this may cause an injury.