All the science equipment uses a lot of electricity. The electricity is divided into three subsystems or parts so no one part has to supply all the electricity itself. That way if one part stops working, there are still two other parts that can continue working.
The amount of electricity that flows is called ‘current’ and is measured in amperes or amps.
Age 0-9: The three parts of the electrical system supply 19, 25, and 17 amps. Add those numbers together to find the total amount of electricity that is flowing?
Age 10-13: Divide the voltage, 120, by the total amount of electricity flowing (from the first question) to find the effective resistance. Resistance is measured in ohms.
Age 11+: What is the total power consumed by the science gear on the plane? (Power = Voltage x Current)