please be seated. summer programs summer programs for pre-college students
Post on 18-Jan-2016
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Pleasebe
Seated
Summer Programsfor
Pre-College Students
New from Lecture-Demonstration
Now on a two-DVD set:The classic four-hour video collection:
Demonstrations in Acousticsfor only $20. Discount for direct cash Sales. Inquire in front.
Dr. Richard E. Berg, demonstrating over 70 experiments, in 29 titled segments, covering vibrations, waves and sound.
You are welcometo visit our
Physics Question of the Week
http://www.physics.umd.edu/lecdem/outreach/QOTW/active/questions.htm
Physics is Phun
ElectronicMailing List
Water
Physics is PhunMay 2009
Image compliments of http://www.inmagine.com/v3058/v3058059-photo
Topics:Physical propertiesElectrical properties
Changes of StateAtmospheric phenomena
Physical Properties of Water
Density = 1 g/cm3 = 1 kg / liter
Specific Gravity = 1.000 @ 3.98oC
Specific Heat = 1 cal / gram oC = 1 Btu / lb oF
Heat of Fusion = 80 cal / gram = 144 Btu / lb
Heat of Vaporization = 540 cal / gram = 970 Btu / lb
Weight and Pressure
Crush the can usingatmospheric pressure
Equilibrium tubes
Quiz question:
What animal has the highest blood pressure?
Mammal, fish, bird, or reptile?
Quiz question:
What animal has the highest blood pressure?
Quiz answer:The giraffe!!
Pascal’s Law
Hero’s Fountain(Hero of Alexandria)
Pressure is distributed uniformly throughout
a confined fluid.
Buoyancy andArchimedes’ Law
An object immersed in a fluidexperiences a buoyant force
equal to the weightof the fluid displaced.
Quiz Question
Adhesion and Cohesion:Surface Tension
Thread loop on water
Capillary tubes
Dilatancy
Electrical Properties
2. Polarization - wood - water
1. Conductivity
Superheated water in a
Microwave Oven
Changes of State
Ice Crystals
Freezing and melting
Putting salt on snow and ice
The Ice Bomb
Evaporationand Condensation
Can collapse by condensation
Freezing water by pumping
Sublimation
Ice disappears in freezer orsub-freezing weather
Frost patterns onwindows(Ice Ferns)
Hailstones
Form in layers
Can be seen usingpolarized light
Waterin the
Atmosphere
RainbowMie scattering
Rainbow
DoubleRainbow
Rainbow with Supernumerary Arc
Glass Bead Rainbow N1-43
“World’s largest human rainbow”
31,000 people at the Polytechnic University of the Philippines.
Correct Rainbow!
South side of Route 50 on Kent Island, MD
Glory
Diffraction effect
Glory 1
Glory 2
Ice crystalsin the
atmosphere
Pencil and
Plate Ice
Crystals
Dispersion by Hexagonal Crystal
Sundog
Dispersion effect
SundogwithSun
Pillar
Halo
Dispersion effect
Halo
Halo with Sundog and Sun Pillar
“Fire Rainbow”
Sunlight enters the hexagonal plate crystals' vertical side faces and leaves through their bottom faces, is refracted (as through a prism) and separated into an array of visible colors
Various atmospheric Phenomena
Wisdomfor theYear
If you are not part of the solution,
you are part ofthe precipitate.
We are on the web at
http://www.physics.umd.edu/lecdem/
Animated Gifs compliments of bellsnwhistles.com
The EndSee you next year!
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