Well, a hockey power play is when there is an uneven number of people on the ice when someone has a penalty. The person who got the penalty sits in the box for 2 minutes or so and the team that he/she was on, has 4 skaters instead of 5 while the other team still has their 5.
The powerball is a multi-state jackpot game with a jackpot starting at $15 million. This power play allows a player to multiply the money in his game. Here is a link to find out more information: