An electric clothes dryer has a resistance of 12 ohms. it draws 20 a of current. what is the voltage, in volts, of the wall outlet that it is plugged into?

When amy exercises in her fitness center for 1 hr she burns a total of 475 calories.if she burns 9 calories a minute jogging on the treadmill and then burns 6.5 calories a minute pedaling on the stationary bicycle how many minutes of the hour does she spend exercising on the bicycle?

The different layers of gases that extend form the surface of the earth into space

Balanced rock sits on a thin spike of rock in a canyon what forces keep the rock balanced on its tiny pedestal