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Physics Final review

Download file "physics exams toto.pdf"

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Waves and sound lab

Team,
We will have several days to complete this lab, so don't panic. You may do these segments in any order, in groups of two or less (no mega-groups).

Speed of sound:
  • Using the water tubes, measure the resonant length for three different frequency tuning forks.
  • Calculate the speed of sound for each
  • Average these
  • Question: what would happen to the wavelength if the temperature rose?
Standing waves:
  • Using the slender springs, create a standing wave a few meters apart. Notice the frequency.
  • Send a pulse along this stretched spring and measure the time it takes to travel from one end out and back. Calculate the velocity of the pulse.
  • Using this velocity and the distance apart, predict the frequency you would need to shake the end to create a single standing wave.
  • Repeat this for a double standing wave.
  • Question: Otis is sitting on a dock in the bay (ha ha ha). He notices waves that are 10 meters apart. If these waves are traveling at 2 m/s, what is their frequency?
Transverse and longitudinal waves:
  • Using the slinky, create a longitudinal wave pulse. Notice the time it takes to reach the other end.
  • Calculate the longitudinal velocity of this wave.
  • Using the same slinky, the same distance apart, calculate the velocity of a transverse wave.
  • Are these similar or different?
  • Question: longitudinal waves can go through solids or liquids. Transverse waves can only go through solids (ocean waves are a different case). Look up seismology online and find out how scientists know that parts of the earth are solid and others liquid.

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Waves

Team,
Our study of waves will involve the following worksheets created by Mr. Bleckel:
Download file "Waves2017.pdf"

Download file "waves2 2017.pdf"

Download file "Introtowaves.pdf"

We'll go over these in class Tuesday 4.18.17, and will use class time Thursday and Friday to work on the labs

Email me if you have any questions
b

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Astro questions 4.9.13

Team,
Please email me your responses by Sunday night:

1. Explain the limitations of using parallax to determine star distances
2. Use three star names in arabic to illustrate why so many star names are in arabic. Explain why this is so.
3. Using red shift, explain why we know how old the universe probably is
4. Explain the first few seconds of the big bang, and why this is bringing physicists and astronomers together in the same quest.
5. What tools are physicists using to explore this?
6. How were telephone engineers instrumental in determining the age of the universe?
7. How did retrograde rotation explain the rotation of the planets?
8. How does the main sequence help us find the age of stars and their temperature?
9. If we know the temperature of a star, how can we find "Goldilocks" planets?
10. Explain how Keck has been so good at finding exoplanets.


let me know how I can help.
aloha
b

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Honors physics astro notes

parallax
tyco brahe
goldilocks planets
aldebaran
exoplanets
ships with no sea
hoku ula

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Lab: Electrical equivalent of heat

Team,
We use electricity to heat water many times in our lives: cooking, cleaning, bathing and so on. How efficient are these heating methods? That's what you are going to determine, using two methods: a hot plate and a microwave oven.

The Hot Plate part:
Measure a certain amount of water ( 200 mL) in a beaker and put on the hotplate.
Put a temp sensor in the water and measure temp for a few minutes to stabilize the temperature.
Once you are confident it has equilibrated, plug the hot plate into a Kill-a-watt unit, which is plugged into the 120Volt outlet.
Turn on the hotplate, and start recording the temperature. A good interval might be every few seconds for at least 2 minutes.
Calculate the slope of the graph, including the units.

Stuff you need to know:
The amount of energy needed to change the temperature is:
Q = mc∆T
Where
Q = energy in Joules
m = mass of water in grams (1 ml = 1 cc = 1 cm2 = 1 gram for water)
c = specific heat of water = 4.18 J/g ˚C
∆T = temperature change in °C

From the Kill-a-watt unit
  • What was the power reading on the hot plate while you were heating the water? This is usually measured in Watts, or joules/sec

From the data:
  • What was the measured slope of the graph, in what units?
  • At what rate was the electrical energy transformed into heat?
  • Calculate the efficiency of the hot plate.
The Microwave part:
Measure about 200 grams of water in a glass beaker.
Using a temp sensor, record the temperature of the water, as you did above.
Plug the microwave into a kill-a-watt unit
Set the microwave oven to 50% power.
Heat the water for two minutes.
Measure the change in temperature, record.

  • What was the change in temperature for the water?
  • How much energy was absorbed by the water?
  • How many seconds did the microwave heat the water?
  • How many Watts were used by the microwave oven?
  • Multiply the Watts x seconds, this should be the number of joules
  • How efficient is the hot plate?

Questions:
1. List at least three ways energy is lost in the microwave heating
2. what are three reasons not to use a microwave to cook with
3. How would you make the hot plate more efficient?
4. What makes the hot plate so inefficient?
5. About how much energy is wasted in cooking in our country?

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Honor Physics Astro 1.0

Team,
We're now moving into the part of your Honors Physics course I've been looking forward to: the study of Astronomy and Astrophysics. What's the difference you ask? That's one of your first questions.
I'll post questions here each week, which will be due the Sunday before we have meetings on Tuesday morning. Why Sunday? It gives me a chance to read your responses and give you feedback before we discuss in our Tuesday meetings.
Here's how we'll start:
Using Wikipedia, look up each of the following, and explain in your own words. Include the following:
a. how recently was this discovered
b. where is research on this most active now
c. why is this relevant to your life
d. what parts of what you have learned in physics are useful in understanding these

The topics:
parallax
parsec
sideral time
quasars
age of the universe
heat death of the universe
background radiation from the big bang
the big bang
planets-define
exoplanets
optical telescope
radio telescopes
pulsar
black hole
red giant
neutron star
main sequence
white dwarf
brown dwarf


Please email my your responses by March 24, the Sunday before classes resume.
Let me know if you have any questions.
aloha
b






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Semester video projects

Physics Semester video project


Topics:

measurement

graphing

vectors and scalars

average velocity

position time graphs

accleleration

velocity-time graphs

freefall

drag

two dimensional motion

projectile motion

forces

F=ma

action= reaction

inertia

PE

Work

Power

KE

Spring energy

Work-energy theorem

momentum

impulse

collisions

circular motion

centripetal force

gravitation

satellites

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Syllabus

Welcome to Physics!
Here's your syllabus
Download file "Physics syllabus 2013_gm.docx"

Welcome to Physics/Physics Honors

Instructors

Jerry Bleckel, Greg McKenna, Dr. Bill Wiecking

jbleckel@hpa.edu, gmckenna@hpa.edu, bill@hpa.edu, physics.hpa.edu

The Course

Physics is an introductory survey course that covers everything in a traditional high school physics course. This year, we will study motion, forces, energy, matter, waves, electricity, magnetism and modern physics.

Text

Active Physics by Eksenkraft, Third edition. Publisher: It’s About Time, Herff Jones Education Division. The text can be found as a .pdf file at physics.hpa.edu. We will supplement this textbook with the excellent online site Khanacademy.org and other videos that can be found on YouTube.com. We will likely use this often to supplement the lectures in class.

What you’ll need to bring to class

scientific calculator other than your phone/tablet

3-ring binder for taking notes, storing handouts, etc. with lined paper

straightedge, colored pencils, other tools.

Classroom Procedures

1. On the way into class, pick up the daily worksheet at the desk nearest the door.

2. All cell phones and electronic devices need to be shut off and put away.

3. When the class begins, students are to be in their seats with their homework on the desk space in front of them. We will go over questions about the homework as well as any questions about the lectures.

4. During group work, students are expected to talk quietly with members of their own group.

5. When help is needed during a test, during seatwork, or during group work, students are to raise their hands for teacher assistance. While waiting, students should continue to try to answer the question on their own.

6. Tardy students must drop their tardy note on the desk as they enter.

7. When absent, students are expected to do the assignments in the syllabus except in unusual cases. It is expected that you will write or call me in such circumstances.

8. Questions of a personal nature, such as questions about points given for a particular assignment, should be brought up individually with the instructor before or after class.

9. If you lose handouts and other papers from class, it is your responsibility to make copies from other students. Papers from recent classes can usually be found in a folder by the door.

Engrade

On Engrade.com, you can find your grades, assignments, and quizzes. We will register for this the first day of school. Your parents will have the opportunity to access Engrade as well.

Grades and Exams

There will be “evening quizzes” each day there is homework. You can find the quizzes in your Engrade account. Check the calendar each day. They will be short, usually 3 multiple-choice questions.

We will have daily quizzes, usually at the end of each class period. These daily quizzes will be short and review the work done during the class period. The daily quizzes will first be scored using the following table:

Correctness

Process

C Complete

J Justified

E Small errors

P partially justified

I Incorrect

N Not justified

Once the daily quizzes are returned, you will have the task of correcting and explaining your mistakes for each problem. (If you receive a score of C/J no correction will be necessary). You will then give yourself a grade for the quiz and return it. I will either agree or disagree with your grade, and enter it in the Engrade grade book. Note: Daily quizzes may also be on the lab investigations. Students may NOT re-take quizzes. Be ready each day.

Formal Labs

You will most likely do one formal lab write-up each quarter, possibly two. They will be graded in the Correctness/Process format above.

Tests

Tests will be given at the end of each unit. Our tests will be based on practice problems that you will already have had a chance to master.

Grading Percentages

Evening quizzes 10%

Daily quizzes (including lab investigations) 10%

Labs (investigations) 10%

Lab formal write-ups 20%

TESTS 50%

Homework/Class Work

We’ll be trying something new this year. Your homework will mostly consist of watching short videos on khanacademy.org and doing a few “easy” questions as well as a complex question or two (once we are able). In class, we will review these videos, practice solving problems and/or do lab investigations. The Engrade homework/quizzes will be CLOSED by 8:30 a.m. the day of class to enable the instructor to view the results prior to class.

Honors?

As you may have noticed, our class is called “Physics/Physics Honors.” All five sections of the course will be treated the same. If you desire to take the challenge of Physics Honors, you will be required to design, create, and execute a science fair project in the fall and winter. In the spring, once the science fair is complete, we will move to another project, most likely astronomy. We will be meeting every Tuesday from 8 – 8:30 a.m. in room 41a. Our first meeting is August 28 in room 41a.

Emergency Procedures

In the event of an emergency, exit the room via either door and gather as a class at the bottom of the hill. Remain quiet and await further instructions.

Final Note

Messrs. Bleckel, McKenna, and Wiecking are all available to help any student, even if they are not your primary teacher.

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