5A+Density+and+pressure

Back to SLG =DENSITY AND PRESSURE= VIDEO OF DENSE GAS (sulphur hexafluoride) (on youtube, sorry China) media type="youtube" key="1PJTq2xQiQ0" height="315" width="420"

5.2 recall and use the relationship between density, mass and volume DENSITY: The mass per unit volume of a substance. Unit is kg/m 3 or g/cm 3 5.3 describe how to determine density using direct measurements of mass and volume



PRACTICAL 1 - Measure the blocks provided and calculate the density of each substance.

PRACTICAL 2 - DULWICH DENSITY CHALLENGE [|Dulwich Density Challenge.doc]

[|VIDEO ABOUT DENSITY OF NEUTRON STAR FROM SIXTY SYMBOLS (ON YOUTUBE, SORRY PEOPLE IN CHINA!)]

DENSITY SIMULATION FROM PHET

[|IG Physics practice questions on Density.pdf]

5.4 recall and use the relationship between pressure, force and area: PRESSURE: The force exerted on a surface per unit area of the surface. Unit is pascal. PASCAL: 1 Pa = 1N/m 2

EXAMPLE 1: Calculate the pressure exerted by a block of wood of mass 335g with sides 20cm, 5cm, 5cm when it stands on: a the largest face; b the smallest face; c a point (approx 1 mm 2 )

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 * PRESSURE!**

5.5 understand that the pressure at a point in a gas or liquid which is at rest acts equally in all directions 5.6 recall and use the relationship for pressure difference: [|WHAT DOES THE PRESSURE DO 11 KM UNDER THE SEA?] - BBC news multimedia report EXAMPLE 2: What is the water pressure 5.0m under the surface of the sea? Density of seawater = 1025 kg/m 3 and gravitational field strength on Earth = 9.81 N/kg.

EXAMPLE 3: a If the density of air is 1.3 kg/m 3, what is the height of the atmosphere? The atmospheric pressure is 100 kPa? b The answer is not quite correct: what assumption did you make about the density? c Do you expect the actual height to be greater or less that the value you found for part a?

COPY AND COMPLETE THE SENTENCES BELOW:
 * [[image:pressure_with_depth.png width="217" height="225" caption="Pressure in a liquid increases ..."]] || [[image:pressure_thumb_tack.png caption="The point of a drawing pin ..."]] || [[image:nothingnerdy/pressure_of_atmosphere width="216" height="247" caption="Atmospheric pressure is big ..."]] ||
 * [[image:dam_pressure.png caption="The base of a dam ..."]] || [[image:pressure_skate.png caption="Ice skates ..."]] || [[image:pressure_bed_of_nails.jpg caption="This doesn't hurt because ..."]] ||
 * [[image:pressure_sunlayers.jpg width="240" height="193" caption="The sun does not collapse under gravity because ..."]] || [[image:nothingnerdy/pressure_straw.gif width="171" height="174" caption="Straws don't suck because ..."]] || [[image:nothingnerdy/pressure_snow_shoe.jpg caption="Snow shoes help because ..."]] ||