Please enable JavaScript.
Coggle requires JavaScript to display documents.
8.1,8.2 - Coggle Diagram
8.1,8.2
Viscosity
Temperature has a big effect on viscosity. The viscosity of a liquid can change based on the temperature. As the temperature of a liquid increases its viscosity decreases (the warmer the liquid the faster it flows). As the temperature of a liquid decreases its viscosity increases (the cooler the liquid the slower it flows)
-
-
Flow Rate
The flow rate of a fluid is the measure at which the speed of the liquid flows. You can measure flow rate by measuring the time it takes a fluid to pass a given point. The greater the viscosity the lower flow rate. The lower the viscosity the lower the flow rate.
Density
The amount of mass contained in a given volume is density. Density is the measure of how closely packed together a substance is. A substance is most dense when it is a solid and least when it is a gas
-
Density and Temperature
According to the particle theory of matter particles move quicker when energy is added. As the substance warms up the particles move quicker and farther apart. This causes the volume of the fluid to increase even though the amount of particles stay the same. A substance generally has a greater density when its in its solid state than its liquid state. The only exception is water
Calculating Density
Density is a ratio of mass and volume. The formula is D=M/V. The unit of measurement for density in a liquid is g/mL and for gasses it is kg/L
Comparing Densities
When comparing densities on a graph, the steeper the slope of the line the greater the density
-
-
Buoyant Force
The earths gravitational force attracts to matter downward towards the earths centre. The fluid however exerts a force upward. That force is the buoyant force
Buoyancy and Gravity
An object will rise in a fluid when: The density of the object is less than the density of the fluid. The buoyant force is greater than the gravitational force on an object
An object will sink when: The density of the object is greater than the density of the fluid. The buoyant force is less than the gravitational force.
An object will float when: The density of the object is equal to the density of the fluid. The Buoyant force is equal to the gravitational force.
Archimedes' Principle
The Archimedes principle states that the buoyant force on an object is equal to weight of the fluid displaced by the object.
Plimsoll Line
The plimsoll line shows how safely a ship can be loaded in certain water conditions. The types of conditions are Tropic Fresh Water, Fresh water, Tropical Salt Water, Summer Salt Water, Winter Salt Water, Winter North Atlantic