a charge of -0.55 * 10^-6 C exerts an upward force of magnitude .250 N on an unknown charge that is .3 meters directly below it. i am to find the unknown charge but I keep getting -5 *10^-6 which I keep getting told its wrong. Can someone give me a hand here? thANKS(adsbygoogle = window.adsbygoogle || []).push({});

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Coulumb 's Law

**Physics Forums | Science Articles, Homework Help, Discussion**