Final answer:
Negative pressure relief valves are not used to measure negative pressure, but rather to relieve excess pressure. In physics, negative pressure is often measured using gauges in certain applications. In a vacuum chamber, for example, the pressure inside is less than atmospheric pressure, resulting in a negative reading on the gauge.
Step-by-step explanation:
In physics, negative pressure relief valves are not a common concept. However, negative pressure is often measured using gauges in certain applications. For example, in a vacuum chamber where some of the air is pumped out, the pressure inside becomes less than atmospheric pressure, resulting in a negative reading on the gauge. This is because the pressure inside the chamber is lower than the pressure outside.
Regarding your question on negative pressure relief valves, they are not used to measure negative pressure but rather to relieve excess pressure. Relief valves are typically found in systems that handle fluids or gases under high pressure. They work by opening up when the pressure exceeds a certain threshold, allowing the fluid or gas to escape and relieve the pressure.