Fluids and Viscosity
What is the formula to calculate density?
D = m/v
Density = mass / volume
What will happen to an object if it's buoyant force equals its own weight (the object will...float, sink or neither)
NEITHER! The forces are balanced and the object will remain suspended at its present depth
Compressability is the ability to put _____ on a substance?
What is EXTERNAL FORCE
What is the best way to describe viscosity?
- resistance to flow of a fluid (thickness / thinness)
- how much and how well a fluid is able to flow
- how easily the particles can slide past one another
This state of matter is the LEAST compressible
What are solids?
If a fluid has a low flow rate, it's viscosity can be described as... (HIGH or LOW?)
What is high?
You have a rock with a volume of 15cm3 and a mass of 45 g. What is its density?
The density is 3.0 g/cm3
What is the best way to describe what buoyancy is?
- How well objects are able to float or sink when placed in fluids (e.g., water)
- The upward force on objects submerged in (under the surface of) or floating on a fluid
Why are gasses more compressible than liquids?
There is less space between particles in a liquid, and gasses have more space between their particles which makes them easier to compress
What does increasing temperature of a liquid do to its viscosity and flow rate?
Explain (using density) why some objects are able to float when placed in water
The density of the object is LESS than the density of water
This scientist first discovered the amount of fluid displaced by an object is equal to its volume and created a scientific principle to explain this relationship
Who is Archimedes?
This is the study of pressure in GASSES
What are pneumatic systems?
What does increasing the temperature do to the viscosity of a gas?
BONUS (200): Explain why the increase in temperature changes the viscosity of a gas
INCREASES viscosity, DECREASE flow rate
BONUS: Increasing the temperature in a gas causes the particles to move faster... This causes more FRICTION because they are colliding more often. Greater friction between particles means higher viscosity
The density of gold is 0.01932 kg/cm3. How much mass would a brick of gold with a volume of 1000 cm3 have?
What is 19320 g?
What happens when the buoyant force acting on an object is GREATER than the objects weight?
The object will rise to the surface and FLOAT!
This is the study of pressure in LIQUIDS
What are hydraulic systems?