Final answer:
The fuel quantity and temperature indications in a car are measured by fuel and temperature gauges respectively, using voltmeters that register the voltage output of 'sender' units.
Step-by-step explanation:
The subject of this question is Physics. The fuel quantity, temperature, and flow indications mentioned in the question are part of the data displayed on the fuel and temperature gauges in a car.
The fuel gauge measures the amount of gasoline in the fuel tank and provides an indication of the remaining fuel. It uses a voltmeter that registers the voltage output of a 'sender' unit, which is hopefully proportional to the amount of gasoline in the tank.
The temperature gauge, on the other hand, measures the engine temperature. It also uses a voltmeter that registers the voltage output of a 'sender' unit, which is hopefully proportional to the engine temperature.