In this applet the future of Earth hangs by a thread of low tensile strength. A terrifying alien must be destroyed with the proton torpedo gun. To eliminate this great menace guide the proton torpedo by moving the charges at the lower left of the screen. To destroy the alien the proton must fire directly through it from its weak underside. If you are successful, and by the forces of Coulomb we hope you are, the alien will disintegrate.
* Theblue negative charges may be click-dragged *Only a direct hit from the aliens weak underside will destroy it *Reload before attempting a second shot
