Under Pressure

Superfluid helium or He II is a macroscopic quantum fluid that exhibits extraordinary properties. %By applying the limit of low flow velocities, The behavior of the fluid can be understood using a Landau - Tisza model, where He II is considered to be a two-component fluid with independent velocity fields: the inviscid superfluid of density $\rho_s$, and the normal fluid of density $\rho_n$, where the total density $\rho$ = $\rho_s$ + $\rho_n$ \cite{Tisza,Landau}. The superfluid has neither…

The purpose of our investigation is to find the most efficient way to recycle cans( make them self- implode) to help the Oakland Recycling Center find the best process for them to recycle aluminum. This problem is important because it is important for us to start recycling cans in order for global warming to decrease in the world. Not recycling cans means that new aluminum cans will have to be made, and to make new aluminum cans people have to dig into the earth’s crust which wastes a lot of…

Some scientist didn’t believe that the popping noise had anything to do with gas bubbles. To follow up on this hypothesis, some scientist used an MRI to prove the “gas bubble theory” wrong. First, scientist had studied 10 joints by using volunteers’ fingers into a tube. They did this so they could apply traction to the joint. They had specifically used the metacarpophalangeal joints because those were the most common joints that people crack. Then, they took images before and after cracking the…

difference in initial pressure inside the bottle rocket and the atmosphere, and the vertical height reached by the bottle rocket after 0.1 seconds, is proportional. This is quantitatively demonstrated by the high R2 value of 0.99533 of the graphed relationship, which indicates the likeness of points in a data set to an established trend; where 1 = a perfect relationship. The gradient of 0.0236 in the best fit regression line of the data, indicates that for every increase of 1 PSI in pressure…

The valves were set up so that the water would flow from Tank 2, through the ½” nominal diameter, type L copper pipe, through the needle valve WV5 (Appendix A), and back to Tank 2. WV5 was initially closed. The Honeywell STD 924 DP meter’s pressure tap lines were placed at PT 1, just before the P-1 Sterlings Fluid System Peerless Pump PE50B1, and PT 10, just after WV5. A Fluke 179 multimeter was attached to the DP electrical box. The multimeter was set to read electrical signal in the form of…

ANEROID – sensitive component in an altimeter or barometer that measures absolute pressure of the air. -Sealed, flat capsule made of thin corrugated disks of metal soldered together and evacuated by pumping all of the air out of it.…

Many young people receive a significant volume of pressure to live up to their families ' expectations. Additionally several parent expectations can damage a child 's self-confidence, self-image, and mentality. Even if the parent means well, children can perceive their good intentions in a different manner. As a Mexican-American Richard Rodriguez felt pressure from his mom and other family members to shield his dark skin from the sun, he speaks on his insecurities in Complexion. Rodriguez…

Private high schools and colleges are becoming increasingly difficult to get into. These pressures trickle down into middle and elementary schools as kids are pushed to be in accelerated programs and constantly reach the top of their class. Even A’s are no longer good enough because one should be getting the A+ or a perfect 100%. One student reported…

Unlike solids and liquids, gases are known to have both variable volume and pressure. The gas laws were formulated in the late 18th century by various scientists to develop a relationship between the volume, pressure, temperature, and the number of moles of a gas.1 This has allowed scientists today to manipulate these variables in controlled lab settings, to utilize these laws in new innovations such as ventilation systems, and to explain observed biological phenomenon like breathing. Boyle’s…

tested, using a gas pressure sensor and a temperature probe, in order to produce constants for both these laws. In Part A, a setup with a 20 mL syringe and a gas pressure sensor was used to measure the effect of a change in volume on the pressure of a gas, and to obtain various data points that were used to measure 4 values for a Boyle’s Law constant. In part B, a setup with a water bath, and a rubber stopper assembly in an Erlenmeyer flask was used to measure the change in pressure of a gas…