Matter, Mixing, and Dissolving
What is the formula to calculate density?
Density = mass/volume
What is viscosity?
What is the thickness or thinness of a liquid - caused by friction between particles
When does an obejct float?
When the buoyant force is greater then the force of gravity (object is less dense)
Pascals (Pa)
What is the difference between homogenous and heterogeneous?
Homogenous - a solution; looks like one type of matter, but it isn't
Heterogeneous - you can see the parts that make up the mixture
How does the viscosity of a liquid change in relation to temperature?
What is when temperature increases the viscosity decreases and as it cools the viscosity increases.
When does an object sink?
When the buoyant force is less then the force of gravity (object is more dense)
What is the formula to calculate pressure?
Pressure = force/area
What is the difference between a solvent and a solute?
Solvent - a substance that dissolves a solute to form a solution
Solute - a substance that dissolves in a solvent
How is density measured?
g/ml
What is more viscous: milk or corn syrup?
corn syrup
What is the force that opposes buoyancy?
Gravity
What is pascals law?
A enclosed fluid exerts pressure in all directions.
What is the difference between saturated and unsaturated?
Saturated - no more solute can be dissolved into a specific amount of solvent at a given temperature
Unsaturated - a solution in which more of the solute could dissolve in a specific amount of solvent at the same temp.
How is viscosity measured?
Flow rate
How does concetraton affect buoyancy (hint: think Dead Sea)?
High concentration will increase density and less dense objects will float in it.
How do hydraulics work?
Allow us to apply more force using pascals law.
Which of the following would have the fastest rate of dissolving? EXPLAIN WHY
a sugar cube in hot water
a sugar cube in cool water
powdered sugar in hot water
powdered sugar in cool water
powdered sugar in hot water
-higher temp
-smaller surface area pp poopoo
Frank has a small cup of apple juice. It has a mass of 4g, and a volume of 2 ml. What is its density?
2 g/ml
What is a test that we use to test for viscosity?
the ramp test, marble drop, viscometer
If a pistin exerts 150 N on an area of 5m2 , what is the pressure exetered by the system?
30 Pa