Tuesday 10 May:

Target: Understanding Waves

 

 

 

 

 

 

L#78: 1- 3, 5, 6, 8, 11, 12, 14, 15 - 18

(due Tues (10 May) (Standing Waves)

 

 

L#79 & 81

#79:  1- 4, 6,

#81:  1- 2, 5, 6, 7, 11, 17, 19

(due Wed (11 May) (Gas Laws)

 

 

Thurs 12 May: Quiz on L# 78 -81

 

 

L#78:

 

 V = (f)(l)

 

Wavelength (l) = 2 wave segments

 

 

 

 

 

       

The next longest standing wave in a tube of length in a tube of length L with one open end and one closed end is the third harmonic.  It also has a displacement antinode at one end and a node at the other.

 

                                     1/2l                 l

 

Transverse Waves:

 

  1. In general, sound is conducted from slowest through fastest through (which medians)?

 

 

 

 

 

 

 

 

 

 

 

    1. vacuum,  then cold air, warm air, liquids, solids

 

  1. Compared to the velocity of a 400 Hz sound, the velocity of 100 Hz sound through air is:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                        Same Velocity! Velocity of sound does not depend on frequency, but on temperature, pressure and density (in a confined space, the speed of sound increases with temperature)

 

3. What is the speed of a wave on a string (10m) with the 4th harmonic and the frequency is 25 Hz?

 

 

 

 

 

 

 

 

c) V = fl = (25)(5) = 125 m/s

4. What is the  ____ of a wave on the same string (10m) with the 1st harmonic (Fundamental)?

a) l

b) speed  

c) Frequency

 

                  

 

 

 

a) l = 20m

b) speed = 125 m/s

c) f = V/l = 125/20 =    6.25Hz

 

 

 

 

 

 

 

 

 

 

 

 

     

           

 

 

 

 

 

L# 79 & 81

Carnot (Car-no)  Cycle:


  •  
 
  1. A high temperature Isothermal Expansion from A to B. - Heat is Supplied to the engine.
     
  2. An Adiabatic expansion cooling down from B to C.
     
  3. A low temperature Isothermal compression from C to D - Heat Removal step.
     
  4. Adiabatic compression from D to A - work performed on fluid.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L#82: 1- 4, 7, 10 - 14, 17, 19

(due Friday (13 May) (Mag Fields)

 

Monday May 16th Gliders:

  • Made out of Paper

  • Who's glider goes the farthest?

 

 

L#85: 2, 4, 7 - 9, 11, 12, 14, 15, 19

(due Tues (17 May) (Inductance)

 

Worksheet (Tues & Wed) (Inductance & Magnets)

 

L#86: 7, 8, 11

(L#87): 3, 11, 14

(due Wed (18 May) (Magnets)

 

 

 

Video:

http://www.youtube.com/results?search_query=physics+mysteries&aq=0

Thurs May 19: Review

(L# 78, 79, 81, 82, 85, 86)

 

Test Friday  20 May  L# 78, 79, 81, 82, 85, 86

 

Egg Bungee (Mon 23 May)

 

 

L#90: 1, 2, 8, 9, 12, 14, 15, 20  

(EM Radiation) Tues 24 May

 

 

 

 

Wed 25 May: Film

Thurs 26 May: 1/2 day

 

L#91: 1, 2, 4, 5, 12 - 15, 20  

(EM Radiation) Fri 27 May

 

Tues 31 May & Wed 1 Jun (DEMO's)

 

 

Thurs 2 June: Review for Final

 

Friday:3 Jun Final (Last test for Sr's)

 

L#93: 1 - 3, 15 - 20  

(Relativity) Wed 8 Jun

 

 

 

Thurs 9 Jun: Mousetrap Cars

 

Friday 10 Jun: Lab: KE --> PE