I would say that when the pump is running pressure is being put on the inside pushing out, blowing it up like a balloon. when the pump is at rest it settles back down to its original size.
The opposite of expand is contract (in some uses, to shrink).For expand (increase), the opposite can be reduce or decrease.For expand (widen), the opposite would be to narrow.For expand (inflate) the opposite would be to deflate.
The opposite of expand is contract (in some uses, to shrink).For expand (increase), the opposite can be reduce or decrease.For expand (widen), the opposite would be to narrow.For expand (inflate) the opposite would be to deflate.
All metals will expand and contract to some degree depending on the temperature.
cells would be specialized to expand and contract
Muscle contract and expand involuntarily to produce heat
Since tornadoes generate low pressure a sealed bag would expand inside of one.
it moves Because almost all Elements expand when heated and contract when cooled. As you are welding the metal at that location is trying to expand because of the heat. Ahead of the weld area the metal isn't moving. Behind the weld area the metal is trying to contract as it cools. If the whole weld could be heated at once it would expand then contract at the same rate without distortion.
No. This is a common miscomception. Fish need to move to filter water through they're lungs to get Oxygen. But Sharks gills contract and expand to draw water in and can remain motionless, and healthy like Nurse Sharks.
Heat would cause the molecules to speed up movement and expand metals. Glass melts, paper burns, clay would shrink as water vapor escapes, etc.
The best way to expand any company is to do market research and to study the competitor. Most security businesses are on a contract basis, so in securing the contract the security company would have to demonstrate their proven ability to provide safety.
I would not. The wood has to expand and contract with temp changes. Your floor will buckle if you do.
That would be a solid. Solids expand and contract with temperature. The only thing that doesn't change with temperature would be degenerate matter such as neutronium.