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24 Cards in this Set
- Front
- Back
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What is the formula relating density, mass and volume? |
density = mass / volume p = m / V |
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How can density, mass and volume be rearranged? |
m = p x V p = m / V V = m / p |
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What is the unit for density? |
kg/m^3 or g/cm^3 |
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What is pressure? |
Force per unit area |
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What is force measured in? |
Newtons |
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What is the unit for pressure? |
Pascals (Pa) (1 PA is equivalent to 1 N/m^2) |
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What is the formula relating pressure, force and area? |
Pressure = force / area p = F / A |
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How can pressure, force and area be rearranged? |
F = p x A p = F / A A = F / p |
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How does pressure act in liquid? |
Equally in all directions as long as the liquid is not moving. Pressure also increases with depthG |
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How can you calculate the pressure difference between two points in a liquid? |
pressure difference = height x density x g p = h x p x g |
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What is the Brownian motion? |
Particles of a liquid or has are moving around continually and burn into each other and into other tiny particles. |
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What did Boyles law find out? |
If you squeeze air in a cylinder, it springs back to its original volume when you release it |
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What did Boyle notice? |
When you double the pressure, the volume of the gas is halved. |
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How is Boyles Law expressed in an equation? |
P1V1 = P2V2 |
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What is absolute zero? |
As you cool gas, the pressure decreases. The pressure of gas cannot become less than zero. This means there is a temperature which cannot cool the gas any further and is called absolute zero. |
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What temperature is absolute zero? |
-273 C |
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What is the Kelvin temperature scale? |
The Kelvin temperature of a gas is proportional to the average kinetic energy of its molecules. It starts from absolute zero. |
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How do you convert from celcius to kelvin? |
Temperature in C = temperature in K -273 (Ex. 20C = 293K) |
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How do you convert from Kelvin to celsius? |
Temp in K = Temp in C + 273 (EX. 400K = 127C) |
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What happens when a solid melts to form a liquid? |
In a solid the particles are tightly packed in a regular pattern. As heat is applied it is transferred to kinetic energy as the particles gain kinetic energy. When they have enough kinetic energy they break free from the intermolecular forces holding them together as a solid and become a liquid. |
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What happens when a liquid turns in to a gas? |
In a liquid the particles are free and are in an irregular pattern. As more heat is applied the particles gain more kinetic energy until they have enough kinetic energy to overcome the intermolecular forces holding them together. They now have little or no intermolecular force and are a gas. |
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What are the arrangments of particles in solids, liquids and gases? |
Solid: low energy; little movement, vibrating on the spot. Liquid: some energy; some movement; particles collide, bouncing apart and creating space between particles. Gas: lots of energy; lots of movement; particles collide a lot, bouncing apart more creating lots of space between particles. |
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How is the Kelvin temperature of gas proportional to the kinetic energy of its molecules? |
The Kelvin temperature scale is in direct proportion to the energy of particles.Because it puts 0 where particles have no energy, as the Kelvin go up so does the energy. |
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What is the relationship between pressure and kelvin temp? |
p1 / T1 = p2 / T2 |
