Like a Roth IRA, you can contribute up to $5,000 per year, although if you earn less than $5,000 in a year youâre allowed to contibute 100% of your earned income (whichever is less). If youâre over the age of 50, you can make catch-up contributions of $1,000 for years 2009 and 2010.oth IRAs. For Roth IRAs, you can contribute $5,000 per year if youâre under the age of 50 and as much as $6,000 annually if youâre over the age of 50.
Glossary of game theory terms. Zero Sum. A zero sum game is a special case of a constant sum game in which all outcomes involve a sum of all player's payoffs of 0. Hence, a gain for one participant is always at the expense of another, such as in most sporting events.
Simple Harmonic Motion. When the speed, and thus kinetic energy, is at maximum, the position is at the equilibrium point so the force, and potential energy, are zero. Conversely, when the position is furthest from equilibrium - that is the potential energy is at maximum, the speed is zero.