Water is forced through a contraction and because of bernoulli’s equation a low pressure is created in the contraction. if the water is at 70oc, and you are at a location of 4000 meters above sea level, what is the minimum absolute and gauge pressure (kpa) that can be produced in the contraction? why is this the minimum pressure?

think its the third option

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

3. dark matter

empty space could also be a simple vacuum