Handed back Ball and Soap Lab, Newton's Law of Cooling Lab
Asked for input on how to make the class better.
Students can do Tsokos problems for credit. Problems must be shown in detail using good problem solving strategy.
Handed back and went over Heat and Thermo test in detail.
On Wednesday, students will do a lab investigating motion of a floating object. Please let me know tomorrow if you need equipment for Wednesday's Lab. Students should use Vernier Equipment in some fashion.
Started SHM
Reviewed equations of motion for constant force
Reviewed Uniform circular motion in which force has a constant magnitude but continually changes direction.
Described SHM - periodic motion that repeats over the same path in which there is a restoring force proportional to the displacement.
SHM: F = - k x
for a spring, k is the spring constant. It is always a positive number.
Showed how to measure the spring constant using Newton's First Law.
Described amplitude, period, frequency
Described radians.
Showed that angular velocity = linear velocity/R = 2 * pi/Period = 2 * pi * f
Finished with short demo using turntable that SHM is a 1-D projection of 2-D Uniform Circular Motion.
Monday, March 14, 2011
Thursday, March 3, 2011
Thursday, Mar 3, 2011
Showed Hewitt video on Heat Transfer, stopping often to emphasize important points. Showed demos of thermal conductivity and heating a balloon with and without water.
Emphasized the macroscopic and microscopic interpretations of hot air rising.
Showed equations for thermal conductivity - got it by intuiting it.
Showed sea breeze examples of convection
Showed Wien's Law and Stefan-Boltzmann equations for radiation. Gave examples of green house effect and power emitted by stars.
Students finished class by working in their packet on the Kinetic Theory.
Emphasized the macroscopic and microscopic interpretations of hot air rising.
Showed equations for thermal conductivity - got it by intuiting it.
Showed sea breeze examples of convection
Showed Wien's Law and Stefan-Boltzmann equations for radiation. Gave examples of green house effect and power emitted by stars.
Students finished class by working in their packet on the Kinetic Theory.
Wednesday, Mar 2, 2011
Students did heat capacity lab. Cut it down to just data acquisition and processing with clearly stated conclusion. Thought that because I told them to determine the density and specific heat capacity (and molar heat capacity) that was telling them too much for the IB planning aspect.
Lab write-up due on Friday.
Lab write-up due on Friday.
Monday, Feb 28, 2011
Went over microscopic view of heat capacity using bucket examples.
Continued in packet.
Continued in packet.
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