Phresman Practice Problems Due Monday

Do the problems in your notebook discuss the answers on the Blog.  You can check your answers online to see if you get them correct but be sure to discuss the solutions.

1. An airplane accelerates down a runway at 3.20 m/s² for 32.8 s until is finally lifts off the ground. Determine the distance traveled before takeoff.
    

   
   
2. A car starts from rest and accelerates uniformly over a time of 5.21 seconds for a distance of 110 m. Determine the acceleration of the car.
    

   
    
   
3. Upton Chuck is riding the Giant Drop at Great America. If Upton free falls for 2.60 seconds, what will be his final velocity and how far will he fall?
    

   
   
   
4. A race car accelerates uniformly from 18.5 m/s to 46.1 m/s in 2.47 seconds. Determine the acceleration of the car and the distance traveled.
    

   
   
   
5. A feather is dropped on the moon from a height of 1.40 meters. The acceleration of gravity on the moon is 1.67 m/s². Determine the time for the feather to fall to the surface of the moon.
    

   
   
   
6. Rocket-powered sleds are used to test the human response to acceleration. If a rocket-powered sled is accelerated to a speed of 444 m/s in 1.83 seconds, then what is the acceleration and what is the distance that the sled travels?
    

   
   
   
7. A bike accelerates uniformly from rest to a speed of 7.10 m/s over a distance of 35.4 m. Determine the acceleration of the bike.
    

   
   
   
8. An engineer is designing the runway for an airport. Of the planes that will use the airport, the lowest acceleration rate is likely to be 3 m/s². The takeoff speed for this plane will be 65 m/s. Assuming this minimum acceleration, what is the minimum allowed length for the runway?
    

   
       
   
9. A car traveling at 22.4 m/s skids to a stop in 2.55 s. Determine the skidding distance of the car (assume uniform acceleration).
    

   
   
10. A kangaroo is capable of jumping to a height of 2.62 m. Determine the takeoff speed of the kangaroo. 

Answers:

1. See solution below.   
2. See solution below.
3. See solution below. 
4. See solution below.
5.  See solution below.  
6. See solution below. 
7. See solution below. 
8. See solution below.   
9. See solution below.

Phresman Can't Jump!

Use the information you attained in class to determine your

• Hang time.
• Jump Velocity
• Hint:

PUKE THE LAB before you start.

If Mr. Crane has a vertical of .51M

• What is his hang time?
• What is his jump velocity?
• Is it possible to have a hang time of 1 second?  Draw a diagram with all the important information to illustrate this phenomenon.
• Is it possible to increase your hang time by running first? Explain your reasoning.  How can you test it?

Click Here you can compare your results to that of world class jumpers

AP PHYSICS THERMODYNAMICS

Read the Chapters on Temperature and Heat 

Try one of the following AP questions

Themodynamics Problems

Check Blog Frequently for updates
Do all posted work including your take home AP test
Print & Complete or copy into notebook
Do Problems 1-8
Resources:
Pencast 1
Pencast 2
Power Points

Objectives

After studying the material of this chapter, you should be able to:
1. Convert a temperature given in degrees Fahrenheit to degrees Celsius and/or degrees Kelvin, and vice versa.
2. State the factors that cause the volume of a solid or liquid to change or the length of a solid to change. Also, solve word problems and determine the final length or volume.
3. Write the mathematical relationships that summarize Boyle's law, Charles law, Gay Lussac's law, and the ideal gas equation. Use these equations to solve word problems.
4. State in your own words Avogadro's hypothesis. State from memory the modern value of Avogadro's number.
5. State the postulates of the kinetic theory of gases.
6. Rewrite the ideal gas equation in terms of motion of the molecules of an ideal gas.
7. Explain what is meant by the term rms velocity.
8. Explain what is meant by Van der Waal's forces.
9. Given a phase diagram for water, determine the range of temperature and pressure at which water is a solid, liquid, or gas. Describe what is meant by the triple point of water and point out the triple point on a phase diagram.
10. Explain what is meant by sublimation and use a phase diagram to determine the range of temperatures and pressures for which the sublimation of water could occur.
11. Explain why evaporation from a liquid is related to the temperature of the liquid and the average kinetic energy of the molecules of the liquid.
12. Explain what is meant by vapor pressure and explain why vapor pressure is related to the temperature of the liquid and the boiling point of the liquid.
~13. Distinguish between relative humidity and absolute humidity and solve word problems related to relative humidity.
~14. Explain what is meant by diffusion and why diffusion is slower through a liquid than through a gas.

Period 4&7 Post Lab Questions HUMAN RXN TIME

You should be have computed your Avg reaction time.

1. What are the units?
2. What was your reaction distance?  Why does it need to be in meters?  Why is inches always a bad idea({you know who you are}?
3. What is your % difference between the avg population?  Avg=.21s
   • Same formula as percent error Hint: Should be in your table of contents
   • Hint: if its not...  your Q4 notebook grade is not going to go well
4. If Mr. Crane can check the bill which is 15 cm what is his reaction time?
5. How does his reaction time compare to everyone else?  How does everyone else compare to him? Support with numbers and calculations see #3
• Explain how this is possible? 

• Finally- you should have a single page labeled in the back of your notebook and construct a well labeled table of personal information.
• create an entry for your reaction time  and how it compares to the rest of the population
• you should include the date time it was calculated and initial it.

Phresman Break Work

Complete all PUKE for classwork problems on worksheet  "Chapter Problems"

• Check Blog Daily for the bonus question!
• Circle all information
• Box the unknown
• Draw a picture
• Make a list with labels of what the quantities represent (Known and Unknown)
• ex. a car starts from rest  that means Vo=0 m/s
• Choose an equation and rearrange the variables so it solves for the Unknown
• Quiz first day back on Puking

Modern Marvels Energy

Option 1:
Either discuss the ideas on the blog and look into alternative "alternative" energy.  Feel free to include links to any resources.  Please post your name.
or complete the attached WS

Option 2:
Complete this WS for Thursday

Watch Video Here

Points of discussion :
cost, benefits, limitations technology any thing else you that comes to mind.

Bragn About Physics+

1996 B3 & B4
http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html

What's going on in the lab.

http://youtu.be/iVpXrbZ4bnU

Physics Makes Me PUKE

PWhat does PUKE stand for?
What should you do after reading the question? See Q#1 from class.
Complete 1-5 
Remainder of notes for Baseball Guys

AP WAVES

Day 82 Notes from Class
6. State the conditions necessary for resonance. Give examples of instances where resonance is a) beneficial and b) destructive. Explain how damped harmonic motion can be achieved to prevent destructive resonance.
7. Distinguish between a longitudinal wave and a transverse wave and give examples of each type of wave.
8. Calculate the speed of longitudinal waves through liquids and solids and the speed of transverse waves in ropes and strings.
9. Calculate the energy transmitted by a wave, the power of a wave and the intensity of a wave, across a unit area A.
10. Describe wave reflection from a barrier, refraction as the wave travels from one medium into another, constructive and destructive interference as waves overlap, and diffraction of waves as they pass around an obstacle.
11. Explain how a standing wave can be produced in a string or rope and calculate the harmonic frequencies needed to produce standing waves in string instruments.

Phreshman test review packet

Complete packet tonight.  Post ask and respond to questions.  Or else!

P7 Monday

P4 Tuesday

 

ANSWERS

AP Physics B Compton Scattering & Photo Electric Effect

• Day 79
• Use the photon theory and Compton's hypothesis to calculate the wavelength of a photon after it has been scattered as a result of a collision with an electron.
• Compton Scattering
• Notes

Introduction
The Compton Effect is the quantum theory of the scattering of electromagnetic waves by
a charged particle in which a portion of the energy of the electromagnetic wave is given
to the charged particle in an elastic, relativistic collision. Compton scattering was
discovered in 1922 by Arthur H. Compton (1892-1962) while conducting research on the
scattering of x-rays by light elements. In 1922 he subsequently reported his experimental
and theoretical results and received the Nobel prize in 1927 for this discovery. His
theoretical explanation of what is now known as Compton scattering deviated from
classical theory and required the use of special relativity and quantum mechanics, both of
which were hardly understood at the time. When first reported, his results were
controversial, but his work quickly ...

Losing My Marbles Lab P.9

SUBMIT LAB AND DATA HERE! DUE Friday!!!

.Conservation of momentum in 2-D
Momentum is conserved

• The total momentum before = the total momentum after
• Write the above idea down mathematically.
• Use your labeled and measured diagram to complete the expression i.e. What represents momentum? Why?
• this is the only physics idea in the lab
• Key Skills Required to complete the lab:
• Vectors
• Define F.O.R.
• Break into individual X&Y problems
• Find X&Y components
• Measurements
• Geometry
• Algebra

Whiteboard in real time: 

http://www.twiddla.com/1562677

.
.

Phreshman Graphing motion 1-14

Discuss, post and answer questions here on the HW.

Link to the WS:

U3_ws1.pdf

Read & Follow the directions carefully.

Help Drawing Slopes:

Drawing Slope and tangents

***  Here is a simulation to help you see and predict p/v/a graphs  this is on the test this week.

--->>the above link requires java be installed and you may need to make an exception in your java control panel.  see instructions

AP PHYSIC The Photo Electric Effect

Make Sure your Browser has Java running and enabled .
If the simulation does not run click here: Java
Objective use the same process described in class and determine the rules of photoelectric emmission
Identify related variables
Identify trends maxs and mins
A diagram should be in your notes as well
You may discuss on the Blog and work collaboratively

Click to Run

Pd4 Graph Stacks

Discuss questions and ideas here.  For questions 4-6.

AP Physics Test Tue Circuits and Electricity

Test Review Circuits
Test will include some electrostatic principles.

P.9 Momentum

Objectives

After studying the material of this chapter, you should be able to:
1. Define linear momentum and write the mathematical formula for linear momentum from memory.
2. Distinguish between the unit of force and momentum.
3. Write Newton's Second Law of Motion in terms of momentum.
4. Define impulse and write the equation that connects impulse and momentum.
5. State the Law of Conservation of Momentum and write, in vector form, the law for a system involving two or more point masses.
6. Distinguish between a perfectly elastic collision and a completely inelastic collision.
7. Apply the laws of conservation of momentum and energy to problems involving collisions between two point masses.


Day 72
Momentum Makes me want to PUKE
Develop Strategies & Practice solving simple momentum and Impulse questions
Recitation and questions
HW
Complete 5 of the practice problems


Day 71 
Summarize Newtons Cradle Activity
Demonstration Impulse & A Change in Momentum
"Egg-citing Physics"
Explain how the same impulse can yield different results and why?


Day 70
Make Observations about Newon's Cradle
Guided Demonstration/Lab
Define Determine Differentiate Momentum and Impulse

AP P2

Complete & Discuss on the Blog

The 1995 question

 Questions

 Methods

 Solutions

Also for the circuit with a capacitor (2000) look at your equation sheet. Easy Peasy.

AP P2

Complete the Question below.  

•

In the circuit shown below, A, B,C, and D are identical light bulbs.  Assume that the battery maintains a constant potential difference between its terminals (i.e., the internal resistance of the battery is assumed to be negligible) and the resistance of each light bulb remains constant.

Draw a diagram of the circuit in the box below, using the following symbols to represent the components in your diagram.  Label the resistors A,B, C, and D to refer to the corresponding light bulbs.

->List the bulbs in order of their brightness, from brightest to least bright.  If any two or more bulbs have the same brightness, state which ones.  Justify your answer.

->Bulb D is then removed from its socket.

.

Describe the change in the brightness, if any, of bulb A when bulb D is removed form its socket.  Justify your answer.

->Describe the change in the brightness, if any, of bulb B when bulb D is removed from its socket.  Justify you answer.

 B.  List the bulbs in order of their brightness, from brightest to least bright.  If any two or more bulbs have the same brightness, state which ones.  Justify your answer.

.

Describe the change in the brightness, if any, of bulb B when bulb D is removed from its socket.  Justify you answer.

 

Bulb B becomes brighter.

It was receiving the least amount of current since D was an alternate pathway for the current.  With D gone all the current must go through B, which is in series now.  More current means B will be brighter.

All Ramped up period 4 only

Discuss this online via the blog include your first initial last name in the post.

Some hints:

Why is this graph signicant to the lab?

How is this different than any other WB?

What is the idea that explains the difference?

Sorry did this Friday & it said it posted!