Question

unit 1: mix and flow of matter

1. provide one example of a hydraulic device.
2. provide one example of a pneumatic device.
3. why must a hydraulic or pneumatic system be completely sealed in order to function properly?

Explanation:

Hydraulic devices use liquid (e.g., car brakes use hydraulic fluid). Pneumatic devices use gas (e.g., air brakes on trucks). Systems must be sealed to maintain pressure (liquids/gases transmit pressure, leaks disrupt this).

Answer:

1. Car brakes.
2. Air brakes on trucks.
3. To maintain pressure for proper function (liquids/gases transmit pressure, leaks disrupt this).