Which statement is true about the two metals used in batteries?(1 point)
Responses
The two metals have opposite charges.
The two metals have opposite charges.
The two metals restrict the flow of electrons.
The two metals restrict the flow of electrons.
The two metals are not reactive to chemicals inside the battery.
The two metals are not reactive to chemicals inside the battery.
The two metals are the same.
The two metals have opposite charges.
Which type of transportation system is best for moving a large amount and wide variety of goods?(1 point)
Responses
rail
rail
air
air
maritime
maritime
road
maritime
Which mode of transportation is best for ensuring fastest delivery?(1 point)
Responses
rail
rail
road
road
air
air
maritime
air
How does combustion occur in a gas engine of a car?(1 point)
Responses
Carbon dioxide and gasoline are compressed in the engine, and the fuel spontaneously ignites.
Carbon dioxide and gasoline are compressed in the engine, and the fuel spontaneously ignites.
Oxygen and gasoline are compressed in the engine, and the fuel spontaneously ignites.
Oxygen and gasoline are compressed in the engine, and the fuel spontaneously ignites.
Carbon dioxide and gasoline are compressed in the engine, and a spark plug ignites the fuel.
Carbon dioxide and gasoline are compressed in the engine, and a spark plug ignites the fuel.
Oxygen and gasoline are compressed in the engine, and a spark plug ignites the fuel.
Oxygen and gasoline are compressed in the engine, and a spark plug ignites the fuel.
The gas pedal belongs to which subsystem of an automobile?(1 point)
Responses
suspension
suspension
guidance
guidance
control
control
transmission