Measurements
What is the density of water?
1.0g/mL
What is the formula for density?
DENSITY = MASS divided by VOLUME
What is the definition of Density?
The measurement of how much mass of a substance is contained in a given volume.
The object floats because-----
Buoyant force is greater that the gravitational force.
Define Force?
Anything that causes a change in the motion of an object.
What is the density of an object that sinks in water?
Greater than 1.0g/mL
What is the formula for volume? (using density)
Mass / Density
What is the definition of Volume?
The amount of space an object takes up.
Why did Mr. Humpty float in salt water?
Mr. Humpty (egg) floated because density of salt water was greater than Mr. Humpty.
What is Archimedes' Principle?
The buoyant force acting on an object equals the weight of the fluid displaced.
What is the density of an object the floats in water?
Less than 1.0g/mL
What is the formula for mass?
Density * Volume
Define Buoyancy?
The tendency of the material to rise or float in a liquid.
What type of buoyancy would a Mr. Nemo ( fish) have that isn’t at the bottom of the lake and isn’t at the top of the surface?
Mr. Nemo (fish) will have neutral Buoyancy.
What are the two forces acting on an object submerged in a liquid?
Gravitational Force and Buoyant force.
What are the units for Density?
Units for Density are g/mL or g/cm3
How will you calculate volume of rectangle or square?
volume= Length x Width x Height
What is average density?
Total mass of an object divided by total volume.
Explain what happens to the density of a substance that is heated?
The density of a substance will Decrease. Molecules spread out And takes up more volume. The Mass stays the same.
Why is density important to understand?
To figure out if an object sinks or floats in water, & density is an important physical property of an element.
Buoyant force is measured in------
Newtons.
How will you find the volume of an irregular object?
By submerging the object in water and measuring how much the volume of the water increases. This amount of displaced water represents the volume of the submerged object.
What is Buoyant force?
The upward force exerted on an object submerged in the fluids.
What would happen if you drop Regular and Diet cola in water?
The Diet Cola floated because of lower density that Regular Cola.
How does Hot air balloon float in air?
When temperatures rise, the gas expands and becomes less dense than surrounding air and hot air balloon floats.