1.28-1.29 properties of matter, Pascals principle .pptx

Properties of Matter

1. 12.1 Properties of Matter

2. Warm-up Turn in Homework to lab station #1 if you have it (if not Due by 3:30pm on Thursday). Pick up a green pressure exploration activity sheet as well as the test #1 review guide.

3. Pascal’s Principle The pressure applied to an incompressible fluid is distributed equally in all parts of the fluid.

4. Pascal’s Principle P= F/A → P = dgh d = density, g = acceleration due to gravity, h = depth

5. A swimming pool of width 9.0 m and length 24.0 m is filled with water to a depth of 3.0 m. If the density of water is 1000kg/m 3 what is the pressure on the bottom of the pool due to the water?  In the previous problem, what is the pressure on the side wall of the pool at the location where it connects to the bottom of the pool?

6. Physical vs Chemical properties Physical Properties are characteristics that can be observed directly Ex: Color, texture, brittleness, phase…etc Physical change: When any change to a substance that does not change its identity. Ex: Change in shape, size, or phase.

7. Physical vs Chemical properties Chemical Properties : are characteristics that can only be observed when a substance goes through a chemical reaction Chemical Change: Any transformation of one substance to another. Ex: Burning wood, combining sodium and chlorine to make salt.

8. Density Is density a physical or chemical property? Think about the variables that make up an object’s density to help you out.

9. Density is a physical property Density = Mass / volume

10. Crystalline and Amorphous Solids Crystalline solid: A solid where atoms are arranged in an orderly, repeating pattern. Ex: Sodium Chloride (table salt)

11. Crystalline and Amorphous Solids Amorphous Solids: Atoms or molecules are arranged in a more or less random matter. Ex: Rubber Glass, plastic.

12. Properties of Solids Tensile Strength: How much stress something can withstand from a force of tension (pulling).

13. Properties of Solids Brittleness : Tendency of a solid to crack when you attempt to deform its shape.

14. Properties of Solids Ductility : The ability for a solid to bend without breaking (opposite of brittleness)

15. Properties of Solids Hardness : A solids resistance to scratching

16. Properties of Solids Elasticity: Describe a solids ability to stretch and then return back to its original size.

17. Properties of Solids Thermal Expansion: Measures the amount that a solid expands with its temperature is increased.