Review for Fluids, Buoyancy, Pressure Test

Match the following

• gas

• state of matter with defined shape and volume

• solid

• state of matter similar to a gas, except all particles have electrical charge

• plasma

• a state of matter lacking a defined shape or volume

• liquid

• a state of matter with defined volume, but no define shape

Tags

NGSS.MS-PS1-4

The change from solid to liquid is ​ (a)   .

The change from solid to gas is ​ (b)   .

The change from gas to liquid is ​ (c)   .

The change from gas to solid is ​ (d)   .

The change from liquid to gas is ​ (e)   .

• melting
• sublimation
• condensation
• deposition
• vaporization
• ionization
• freezing

Tags

NGSS.MS-PS1-4

Which statements are true about Pascal's formula

• It states that P = F/A

• English measure for Pressure is psi

• Metric measure for Pressure is Newtons

• the "A" in the equation stands for Area

Answer explanation

The metric measure of Pressure is a Pascal

The atmospheric pressure at (a)   is 101,000 Pa

What is true about the equation: P = (density)(g)(h)

Choose any/all correct answers

• it helps us to determine gauge pressure

• the units for density are m/s^2

• The units for h is m

• g stands for grams

Answer explanation

density will almost always be 1000 kg/m^3 (density of water)

g is gravity in m/s^2

To convert between psi and (a)   , I will multiply by 6,871

In order to determine ___ ___, I must add atmospheric pressure to gauge pressure

(a)  

In the pressure/footprint lab, we traced our footprints on cm graph paper. Then we counted the number of boxes (approximately) to give us an AREA of our foot print. Which of the following statements is correct if my footprint area was 195 cm^2?

• We found the area, so we could determine the force of our footprint

• 195 cm^2 is equivalent to 1.95 m^2

• We could find "FORCE" in the P=F/A equation by taking our weight in pounds and converting it to Newtons

• We were able to determine the Pressure in Pascals with this measurement and our weight.

Answer explanation

We found the area in m^2 and the Force/weight (in Newtons) to determine our pressure.

If the measurement is 195 cm^2, we actually move the decimal four to the left to get m^2, so that would be 0.0195 m^2

According to equation of continuity, A₁V₁ = A₂V₂ = constant. The constant is equal to:

• Flow rate, R

• Volume of fluid, V

• Mass of fluid, m

• Density of fluid, ρ

According to Bernoulli's Principle, when the wind speed is high, wind pressure is ________

• High

• Low

• Not enough information to solve