Search

Browse

Mesoscale Terms
Instruments
Models
Units
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

O

Oersted- Named for Hans Christian Oersted, Danish physicist and chemist, who discovered the relationship between electric currents and magnetic fields.

Ohm- The SI derived unit of electrical resistance (derived from the ampere and the watt); the resistance, at 0C of a uniform column of mercury weighing 14.451 grams (One ohm is the value of resistance through which a potential difference of one volt will maintain a current of one ampere).

Ounce- A unit of measurement of both weight and liquid volume in the English system (an ounce is equal to approximately 28.35 grams and a fluid ounce is equal to approximately 29.57 milliliters in the metric system).