What is the major force that keeps the moon in it's orbit around the earth?

The current in a hair dryer measures 11 amps. the resistance of the hair dryer is 12 ohms. what is the voltage?unit:

What is the primary force that suspension bridges use cables to hold their spans up? a. tension force b. resistance force c. normal force d. elastic force e. applied force

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?