READ THIS NOW Mandatory Assignments

Mandatory means mandatory. The Premidyear assignment for Honors Sect 2 and the study group meetings and reports for AP were mandatory. One report for AP Sect3 and two for AP Sect 4 Those who did not turn these assignments in will lose a grade interval e.g A to A- . Students in AP Sect 4 who handed in only one have until Feb. 1 to turn in the second study group report.

Next quarter no student will receive a grade until all mandatory assignments are completed and lateness will result in penalties.

Required Honors Assignment Due Friday

This is an assignment due Friday for Period 8 classes and Monday for Period 3 .

http://h1.ripway.com/DrCherdack/PreMidyearRequiredHomework.doc

Honors Midyear Answers 1-20

Here are answers for Honors Midyear Review 1-20

Honors Midyear Practice Answers 07

1 a heat
b motion, forces momentum, and macroscopic energy,
c interaction of particles at molecular, atomic, and subatomic scales
d light

2 models which focus on the most relevant features

3 a sec b meters c kg d Joules

4A a fusion b fission c fission d fusion

4B a 4C a 4D c 4E b 4F d

5 d

6 skip

7 a acceleration; b velocity; c height; d angle.

8 b. m/s2 d. m2/s3 f. s2 g. 1/s2 h. 1/s2 .

9. v = Dx/Dt a= 2Dx/Dt2

10. c

11. b

12 velocity : +,-,0 a: 0, +,-

13 a = (16-1)/3 = 5 m/s2

14 vavg = (30 +0)/2 =15 a = (30-0)/4 = 7.5 m/s2 Dx = vavg Dt = 15x4=60

15.a +,-; b 0,-; c +,+?; d -,-

16 a

17 a

17.a . 4 sec

18 quantity; quantity with direction; sum of two or more vectors; environment from which measurements or observations are made - usually an entire frame of reference moves with a single velocity
19. a
20 Vectors: force acceleration, momentum, displacement, Scalars mass energy volume speed

Honors Midyear Review package

Here is the review package for my Honors classes. Many of you did not pick them up yet, but your homework is still 1-20 tomorrow. There will be a quiz based on this package.

http://h1.ripway.com/DrCherdack/Midyrpractice07.doc

Quizzes this week (1/15/07)

For both AP AND Honors there will be a daily quiz comprising one or two of the prior night's homework. If you are stuck on a problem email me and I'll try to get you a solution before you retire for the evening.

AP Unit 8 Thermo, Problem Sheet Corrections

1) Correction for problem sheet number 12: The answer I gave is the increase in thickness not the total final thickness. The total final thickness is .0603 m

2) Correction for problem sheet number 13 b: The answer is the heat of fusion = 50,000 J/kg

Assignment for Monday Night

While I assume something of this kind is being done for your other classes, I would like you to read martin Luther King's I have a dream speech (it can be found at http://www.usconstitution.net/dream.html) and write one paragraph about what you have done in the past week or what you will do in the next two days to help foster its realization.

Thermodynamics

Two new posts:

1) This one sorts out the erros on the Grainsheet Carnot cycle and also offers a different and more efficient Carnot Cycle than the original.

http://h1.ripway.com/DrCherdack/CarnotCycleforGrainElevatorSheet.doc

2) This is the derivation for the overall thermal resistance I couldn't think of during first period

http://h1.ripway.com/DrCherdack/HeatConductionDerivationr1.doc

Thermo Notes

Here are three sets of notes that might help.

1) Pretty sophisticated derivation of relation between cp and cv and why Px V^(cp/cv) is a constant during adiabatic processes

http://h1.ripway.com/DrCherdack/NotesonBasicGasThermo.doc

2) Notes on mixing and heat transfer

http://h1.ripway.com/DrCherdack/NotesonHeatR1.doc

3) The thermo notes you already have. This might be a slightly revised issue. I'll try to confirm or deny this.
http://h1.ripway.com/DrCherdack/NotesonThermoR2.doc

Tests AP and Honors

All my classes will be tested on Friday.

The Honors test will cover rotional motion including torque and angular acceleration and centripetal acceleration and force. Thursday will be used for reviewing homework

AP students will be tested on thermodynamics including a little heat transfer, a little mixing , a lot of gas laws and cycles and some entropy, whatever that is.

AP Planets and Orbits

AP students should look over the following; (They are not live links so you'll have to copy and paste into your browser.)

The first one describes how to find the angular speed of a planet and the period of rotation.
1) http://h1.ripway.com/DrCherdack/planetsorSatellitesinOrbit.doc

The second one is a series of exercises to help you understand the relationship between frequency, angular speed, and period and how the force of gravity changes when mass or distance changes.

2)http://h1.ripway.com/DrCherdack/gravandrotvariablereviewsheet.doc

The third is an excel workbook. The "planet data form" spread sheet lists the planets, their distance from the sun; their masses; and asks you to find the force of gravity and orbit parameters. The "planet data" spreadsheet has the results http://h1.ripway.com/DrCherdack/SolarSystem.xls

Honors Quiz

Please bring your Rotational Motion Quiz in Monday. I need to confirm the grades are correct. Passs the word to your classmates who may miss this posting.

AP Study Groups

Study Group Meetings are Mandatory. You must meet at least once every two weeks for one hour PLUS at least once during each break. Each student must write a one paragraph summary of what happened. Each meeting is worth 7 homework points. If your group is not working out, let me know immediately. The groups should be used to review for the midyear exam.

Revised Rotational Motion

Keep in mind that angular displacement,velocity, and acceleration can be treated in the same way as linear quantities. For example ( w is omega here)

w final = w intial + aplha delta t

delta theta = (w final+ w initial)/2 x delta t
delta theta = (wfinal squared - winitial squared)/2 alpha
delta theta = w initial x delta t + 1/2 aplha x delta t squared

Angular mechanics is similar to linear with torque replacing force; Moment of inertia [I] replacing mass [M]; w replacing v; and alpha replacing a.

For example, a = F/M in linear motion is replaced by alpha = Torque/ I in rotational (angular) motion. KE linear =M vsquared/ 2 but KE rotational = I wsquared/2