Ch 3.3 States of Matter Physical Science 08 Lee Ann Youse PS08 14 Slides & 27 Slides This is 3 D. We are doing section 4 before section 3. That is Boyle’s Law before Archimedes’ 3.3 B 9/12/20151

3.3 Quizzes 3.3 A Questions tomorrow--Tuesday 3.3 A Questions tomorrow--Tuesday 3.3 B Questions (but mostly ) the next day-- Wed 3.3 B Questions (but mostly ) the next day-- Wed Remember ‘Half’ Test for section 3.3 & 3.4 will be the day after that--Thurs. It will add with the ‘Half’ Test we took on 3.1 & 3.2. THERE WILL BE NO TEST ON ALL OF CHAPTER 3 AT THE SAME TIME. What were those book authors thinking!!!!!  Remember ‘Half’ Test for section 3.3 & 3.4 will be the day after that--Thurs. It will add with the ‘Half’ Test we took on 3.1 & 3.2. THERE WILL BE NO TEST ON ALL OF CHAPTER 3 AT THE SAME TIME. What were those book authors thinking!!!!!  PS08 14 Slides & 27 Slides 9/12/20152

Define pressure The amount of force The amount of force exerted on exerted on a given area of surface  a given area of surface  PS08 14 Slides & 27 Slides 9/12/20153

Give how fluids are different (from solids ) They exert pressure evenly in all directions  They exert pressure evenly in all directions  PS08 14 Slides & 27 Slides 9/12/20154

Review Kinetic Theory of Matter. .  PS08 14 Slides & 27 Slides 9/12/20155

Using the kinetic theory of matter to explain how air in a tire (or balloon) works Tiny air particles Tiny air particles push (force) against each other and against the sides, push (force) against each other and against the sides, causing pressure in all directions  causing pressure in all directions  PS08 14 Slides & 27 Slides 9/12/20156

Give the formula for pressure in words and symbol form Pressure is equal to force divided by area Pressure is equal to force divided by area PS08 14 Slides & 27 Slides 9/12/20157

Give the formula symbol for pressure P PS08 14 Slides & 27 Slides 9/12/20158

Give the formula symbol for force F PS08 14 Slides & 27 Slides 9/12/20159

Give the formula symbol for area A PS08 14 Slides & 27 Slides 9/12/201510

Give the SI unit and its abbreviation for pressure pascalPa PS08 14 Slides & 27 Slides 9/12/201511

Give the SI unit and its abbreviation for force newtonN PS08 14 Slides & 27 Slides 9/12/201512

Give the SI unit and its abbreviation for area meters squared m2m2m2m2 PS08 14 Slides & 27 Slides 9/12/201513

On a clean Sheet of Paper Calculate Pressure, Force, or area Calculate Pressure, Force, or area Write the formula (rearrange if necessary) Write the formula (rearrange if necessary) Substitute # in formula Substitute # in formula Calculate Calculate Write Answer with correct unit. Write Answer with correct unit. 9/12/2015 PS08 14 Slides & 27 Slides 14

Quiz tomorrow on Q PS08 14 Slides & 27 Slides 9/12/201515

Define buoyant force An upward An upward push push exerted by a fluid  exerted by a fluid  PS08 14 Slides & 27 Slides 9/12/

Explain how buoyant force works Pressure (F/A) increases with depth. Pressure (F/A) increases with depth. The force pushing up is greater than the force pushing down. The force pushing up is greater than the force pushing down. The net force is upward  The net force is upward  PS08 14 Slides & 27 Slides 9/12/ ensity+and+Buoyancy video near the bottom of this page

State and use Archimedes’ Principle The buoyant force on an object in a fluid The buoyant force on an object in a fluid is an upward force equal to the weight is an upward force equal to the weight of the fluid displaced (moved aside)  of the fluid displaced (moved aside)  PS08 14 Slides & 27 Slides 9/12/ hys/physics.html hys/physics.html hys/physics.html hys/physics.html

Using Archimedes’ Principle, explain how to determine whether an object will float or sink Compare the buoyant force on the object with the object’s weight. Compare the buoyant force on the object with the object’s weight. If the buoyant force is equal to the weight then the object will float. If the buoyant force is equal to the weight then the object will float. If buoyant force is less then the object will sink.  If buoyant force is less then the object will sink.  9/12/2015 PS08 14 Slides & 27 Slides 19

Demo “A SHIP, A ROCK AND A LOG” /work2.htm  /work2.htm  /work2.htm /work2.htm 9/12/2015 PS08 14 Slides & 27 Slides 20

Using the quantity, density, explain how to determine whether an object will float or sink If the density is greater than the density of water, then it will sink. If the density is greater than the density of water, then it will sink. If the density is less than the density of water, it will float.  If the density is less than the density of water, it will float.  9/12/2015 PS08 14 Slides & 27 Slides 21

Using Archimedes’ Principle and density, explain how various materials that are denser than water can still float on water (i.e., a steel ship, sub, etc.) Ships have the steel pushed out into a hollow shape. The shape is larger and pushes more water aside, Ships have the steel pushed out into a hollow shape. The shape is larger and pushes more water aside, giving it a larger buoyant force. giving it a larger buoyant force. Since there is air as well as steel in the ship, Since there is air as well as steel in the ship, the density of the whole ship is less than that of water.  the density of the whole ship is less than that of water.  9/12/2015 PS08 14 Slides & 27 Slides 22 K3N1c/S226/buoyant2.gif buoyancy/AnswerDetails.do?requestId= &responseId=

State and use Pascal’s Principle Pressure Pressure Applied to a fluid Applied to a fluid Is transmitted unchanged Is transmitted unchanged through out the fluid. through out the fluid. (toothpaste tube, Cartesian Diver, hydraulic devices)  (toothpaste tube, Cartesian Diver, hydraulic devices)  9/12/2015 PS08 14 Slides & 27 Slides 23 video os/avimov/bychptr/chptr4_matter.htm

Give and use Pascal’s principle expressed in mathematical form 9/12/2015 PS08 14 Slides & 27 Slides 24 Go to website: _e.htm

State and use Bernoulli’s Principle As the velocity of a fluid increases, As the velocity of a fluid increases, the pressure exerted by the fluid decreases the pressure exerted by the fluid decreases (airplane lift, race car design)  (airplane lift, race car design)  9/12/2015 PS08 14 Slides & 27 Slides energy/wind-turbine.jpeg

State and use the Venturi Effect 9/12/2015 PS08 14 Slides & 27 Slides 26

Use the Venturi Effect 9/12/2015 PS08 14 Slides & 27 Slides Bahrain

State and use the Venturi Effect Fluids flow faster when forced to flow in narrow places. Fluids flow faster when forced to flow in narrow places. (rapids, garden hose, squirt bottles, windy cities, etc.)  (rapids, garden hose, squirt bottles, windy cities, etc.)  9/12/2015 PS08 14 Slides & 27 Slides 28 See this video i.html

State and use the Venturi Effect Fluids flow faster when forced to flow in narrow places. Fluids flow faster when forced to flow in narrow places. (rapids, garden hose, squirt bottles, windy cities, etc.)  (rapids, garden hose, squirt bottles, windy cities, etc.)  9/12/2015 PS08 14 Slides & 27 Slides 29 See this video mc1919/venturi.html

The end Quiz tomorrow Q (mostly 55-64). Quiz tomorrow Q (mostly 55-64). “Half” TEST the next day “Half” TEST the next day PS08 14 Slides & 27 Slides 9/12/201530