What is a vacuum pump used for? Does it cost alot to make a vacuum by myself?

Question

Thanks for answering.

Thanks for your answers. The reason I asked this question was, because I wanted to conduct experiment this First law of motion in a vaccum. To see if a pendulum would move forever?

Thanks for your answers. The reason I asked this question was, because I wanted to conduct experiment theFirst law of motion in a vaccum, to see if a pendulum would move forever?

Answer 1

Half-crazy-half-nerd' -- good answer

I would only add that we generally call them vacuum pumps are most often used when a vacuum is the goal of their operation. All pumps and compressors reduce pressure at inlet as part of their operation. A vacuum cleaner gets it's name because of the vacuum formed.

We use the specific term "vacuum pump" when the purpose of the pump is to create a stable vacuum, like when you are working on an air-conditioner system and you need to make sure there is no air in the freon plumbing before putting the freon in. You attach a vacuum pump and leave it there, making sure you have a good hard vacuum in the piping (which means no air). This is a classic example of vacuum pump use.

Answer 2

Hey, a vacuum pump can be used for many things, including for suction of liquids and gases. Does is cost a lot to make one by yourself? Well, it really depends on how strong of a vacuum you want and what energy source you want to use. A regular seringe is in fact a vacuum pump that requires only energy from your muscles. Other pumps, like the ones that you use in the car wash requires more power. You will definitely need a power supply for that. So to answer your question, you can make a simple vacuum pump by yourself, but you will probably need much more materials than is found in a typical household to make a "good" vacuum pump.

Answer 3

You probably have a vacuum in the house. The empty space above the liquid in a glass thermometer is a vacuum. A couple of examples of where vacuums are used industrially are heavy oil distillation where sub atmospheric pressure allows the oil to boil at a lower temperature and avoids damaging the oil. Another is at the outlet to large steam turbines where condensing the steam at low pressure increases efficiency.

Answer 4

An interesting experiment. Removing the air from around the pendulum should increase the swing time because it will remove the friction from the air. However, you will still have friction in the bearing the pendulum hangs from.