[word=If] □ □
[word=If] [□] □
[word=If] (□ | □) □
If you remember you conic sections , you 'll recognize this as the equation for a hyperbola . If you pour LN on your hand , then it evaporates , leaving a cushion of insulating air between your skin an the Cold Stuff . If you point your thumb in the direction of the current , your fingers will curl around in the direction of the field lines . If you spend your holiday near marine waters do n't forget to collect some marine microorganisms . ( If you double-click , the animation will stop ; double-click again to restart the animation .