1
_____ is the upward force that a fluid exerts on an object.
Buoyancy
Boats are able to stay afloat because of the force caused by __________
Buoyancy
If the density of an object is 1.724g/cm³ what will the buoyancy be if Water's density is 1 g/ml or 1 g/cm³.
Negative
What is matter?
Matter is anything that has mass (weight) and takes up space
Why are solids generally more dense than liquids or gases ?
Solids particles are tightly packed, resulting in high densities
_____ is the ratio of mass to volume.
Density
Which law states the upward force that is exerted on a body immersed in a fluid is equal to the weight of the fluid displaced by the object.
Archimedes’ Principle
What are the three states of matter
solid
liquid
gas
What is Pascal’s law?
Pascal’s law states that if pressure is exerted on a fluid, it will be evenly
distributed throughout the fluid.
mass
X = ---------
Volume
Formula for Density
____ is a measure of a fluid's resistance to flow.
Viscosity
Give an example of a Pneumatic system and why?
Answer may vary
Ie: Water tower
How is mass different from weight?
Mass is a measure of how much mass is in an object, whereas weight is
a measure of how the force of gravity acts upon that mass.
Define fluid. Which state(s) of matter are considered fluids?
A fluid is a material that has no fixed shape and is free to flow, such as
a liquid or gas. Liquids and gases are considered fluids.
The density of water in a jar is 1 g/ml. If we added these fluids to the jar which ones would sink and which would float?
Fluids : Honey - 1.4 g/ml, milk - 1.03 g/ml, motor oil - 0.9 g/ml
Floats: motor oil
Sinks: milk, and then honey
_________
is the word used to describe compressed air or gas
under pressure.
Pneumatic
Name 3 factors that affect Viscosity
friction
adhesion
cohesion
temperature
pressure
Which human body system is most similar to a hydraulic system? Why?
The circulatory System because the heart acts as a Hydraulic pump
Which human body system is most similar to a pneumatic system? why?
The respiratory
system resembles a pneumatic system. The lungs in the respiratory
system exchange gas and increase and decrease pressure of O2 and
W = m × g
What do each of these variables represent ?
● W is the weight of an object
● m is the mass of an object
● g is the acceleration of gravity
_________
describes liquid that is under pressure or in a confined space.
Hydraulic
A metal block has a mass of 1100 g and has dimensions of 8.5 cm
by 6 cm by 10 cm. Use this information to find the density of the metal block
Volume = L x W x H
Volume = 8.5 x 6 x 10
Volume = 510 cm³
Density = Mass/Volume
Density = 1100 g / 510 cm³
Density = 2.16 g/cm³
True or False
Hot air always rises. This is because hot air molecules are more spread out, and this makes them less dense. This lower density causes the hot air to move above the cooler air
True
True or False
Fish have swim bladders which allow them to adjust their buoyancy. The bladder controls buoyancy by controlling the carbon dioxide that comes in and out of the bladder
False
The bladder controls buoyancy by controlling the oxygen that comes in and out of the bladder
Which cube has the lowest density...cube A or cube B?
The length, width, and height of cube A are each 2 cm. The mass of cube A is 40 grams.
The length, width, and height of cube B are each 3 cm. The mass of cube B is 60 grams.
cube B