Wednesday, November 19, 2008
November 19, 2008
Kinematics!
Today in class, we had a substitute filling in for Ms. Kozoriz and corrected the chapter 3 study guide. I'll post the answers up just in case anyone missed any blanks.
Position and Distance
An object's position can be described in terms of its relationship to a reference point. Choosing a reference point establishes a(n) frame of reference. Describing distance does not need a(n) frame reference. Distance involves only a measurement of length, and is a(n) scalar quantity. Position involves both distance and direction, and is a(n) vector quantity.
Average Velocity
If an object is moving, its position at one and only one time is a(n) instantaneous position. The change is position of an object is its displacement, which is a(n) vector quantity. The average velocity of an object is the change in position divide by the time interval over which the change occurred. Average velocity is calculated using the equation v=Δd/ Δt. In this equation Δd, which is read as "delta d", stands for displacement. the symbol Δt, which is read as "delta t", stands for time interval. Average velocity is expressed in a unit made up of a(n) distance unit divided by a(n) time unit. Different units used to describe average velocity can be change can be changed from one to another by the use of conversion factors.
Finding Displacement from Velocity and Time
Displacement can be caculated by using the equation Δd= v Δt. In this equation, v represents average velocity and Δt represents the time intercal. if the average velocity of an object is the same at all time intervals, the object is described as moving at constant, or uniform, velocity. Constant velocity can be calculated using the equation v=d/t.
Position-Time Graphs
A position-time graph is used to show how position depends on time. If the motion is constant, the data produced a(n) straight line, which means the relationship between time and position is linear.
The Slope of a Position-Time Graph
On a position-time graph, the displacement is the vertical separation of two points. The time interval is the horizontal separation. the slop of the ratio of the rise to the run. The rise of the line represents displacement. The run of the line represents the time interval. the slope of the line represents the velocity of the object.
Positive and Negative Velocities
Displacements can be positive or negative, but time interval are always positive. Displacements to the right or the reference point are positive. Displacements to the left of the reference point are negative. Speed is the magnitude of velocity. Speed is generally shown as positive, but velocity can be positive or negative.
Instantaneous Velocity
If motion is not constant, the position-time grpah does not produce a(n) straight line. A straight line can be drawn tangent to the curve at any one point. The slope of this line is the instantanrous velocity at that point.
Velocity-Time Graphs
In a velocity-time graph, time is shown on the horizontal axis and velocity is shown on the vertical axis. If velocity is constant, the velocity-time graph produces a(n) straight line that is parallel to the horizontal axis. If velocity is incresing, the line has a(n) positive slope. If velocity is decreasing, the line has a(n) negative slope. The vertical value of any point on the line is the instaneous velocity at that time. The area under the line on a velocity-time graph is equal to the displacement of the object from its orignal position to its position at a given time.
Relativity of Velocity
Measurements of position of velocity depend on the observer's frame of reference. If a person walks slowly toward the back of a moving train, an observer on the train would say that the velocity and displacement are negative. A observer standing on the station platform would say that the walkers velocity and displacement are positive. Howerever, when velocities approach the speed of light, the frame of reference does not matter, and the velocity is the same, This concept is part of Einstein's theory of relativity.
We were also given time to do other worksheets (chapter 4 study guide and section 4.1: properties of vectors)
Kinematics!
Today in class, we had a substitute filling in for Ms. Kozoriz and corrected the chapter 3 study guide. I'll post the answers up just in case anyone missed any blanks.
Position and Distance
An object's position can be described in terms of its relationship to a reference point. Choosing a reference point establishes a(n) frame of reference. Describing distance does not need a(n) frame reference. Distance involves only a measurement of length, and is a(n) scalar quantity. Position involves both distance and direction, and is a(n) vector quantity.
Average Velocity
If an object is moving, its position at one and only one time is a(n) instantaneous position. The change is position of an object is its displacement, which is a(n) vector quantity. The average velocity of an object is the change in position divide by the time interval over which the change occurred. Average velocity is calculated using the equation v=Δd/ Δt. In this equation Δd, which is read as "delta d", stands for displacement. the symbol Δt, which is read as "delta t", stands for time interval. Average velocity is expressed in a unit made up of a(n) distance unit divided by a(n) time unit. Different units used to describe average velocity can be change can be changed from one to another by the use of conversion factors.
Finding Displacement from Velocity and Time
Displacement can be caculated by using the equation Δd= v Δt. In this equation, v represents average velocity and Δt represents the time intercal. if the average velocity of an object is the same at all time intervals, the object is described as moving at constant, or uniform, velocity. Constant velocity can be calculated using the equation v=d/t.
Position-Time Graphs
A position-time graph is used to show how position depends on time. If the motion is constant, the data produced a(n) straight line, which means the relationship between time and position is linear.
The Slope of a Position-Time Graph
On a position-time graph, the displacement is the vertical separation of two points. The time interval is the horizontal separation. the slop of the ratio of the rise to the run. The rise of the line represents displacement. The run of the line represents the time interval. the slope of the line represents the velocity of the object.
Positive and Negative Velocities
Displacements can be positive or negative, but time interval are always positive. Displacements to the right or the reference point are positive. Displacements to the left of the reference point are negative. Speed is the magnitude of velocity. Speed is generally shown as positive, but velocity can be positive or negative.
Instantaneous Velocity
If motion is not constant, the position-time grpah does not produce a(n) straight line. A straight line can be drawn tangent to the curve at any one point. The slope of this line is the instantanrous velocity at that point.
Velocity-Time Graphs
In a velocity-time graph, time is shown on the horizontal axis and velocity is shown on the vertical axis. If velocity is constant, the velocity-time graph produces a(n) straight line that is parallel to the horizontal axis. If velocity is incresing, the line has a(n) positive slope. If velocity is decreasing, the line has a(n) negative slope. The vertical value of any point on the line is the instaneous velocity at that time. The area under the line on a velocity-time graph is equal to the displacement of the object from its orignal position to its position at a given time.
Relativity of Velocity
Measurements of position of velocity depend on the observer's frame of reference. If a person walks slowly toward the back of a moving train, an observer on the train would say that the velocity and displacement are negative. A observer standing on the station platform would say that the walkers velocity and displacement are positive. Howerever, when velocities approach the speed of light, the frame of reference does not matter, and the velocity is the same, This concept is part of Einstein's theory of relativity.
We were also given time to do other worksheets (chapter 4 study guide and section 4.1: properties of vectors)
Tuesday, November 18, 2008
Kinematics
Hello !
Today in class we did quite a bunch of things. One of which was correcting Appendix 3.6: Describing Motion in Various Ways
Appendix 3.6: Describing Motion in Various Ways:
I'm pretty sure that people made some minor mistakes because of the "ohhh!" reactions and "that's how it is!" responses after Mrs. K told us the answers. I think the tricky part of the whole thing was the l ast two questions. (Question 4 letters e and f)
e) What is the total displacement for the student's journey? Find this from the graph.
I'm pretty sure most of got the right numeric answer (5m) but must of us missed the minor things that makes all the difference. First of all, this one needs a direction [south] and since it's going in the southerly direction, it is negative. Therefore you can either put your answer in the form 5m [south] OR -5m to show the negative.
f) What is the average velocity for the whole journey?
Average velocity can be calculated using the formula v = d/t
The tricky part of this question is the same as the last question. Basically the possible minor errors that can occur can lose you a mark!
answer: .1 m/s [s] OR -.1 m/s
--
Aside from correcting the worksheet, Mrs. Kozoriz left us with other work to do. Those are all for homework (Position-Time Graphs, Chapter 3 Study Guide and Study Guide 5.1 Graphing Motion in One Dimension)
OUR NEXT SCRIBE IS:: LYNEL POBRE!
Monday, November 17, 2008
November 14 && 17, 2008
--------Friday, november 14,2008 -------
In physics class, we corrected the test on the supporting arguments of both particle and wave theories of light. It was out of 30 and it was calles Nature of Light II.... here are the corrections :
1. a.) Rectilinear Propagation: Light travels in straight lines, and its very fast.
example: a ball thrown quickly travels straight.
b.) Reflection: angle of reflection equals angle of refraction.
c.) Refraction: Light moves slower on a less dense medium.
2.a.) Rectilinear Propagation:
b.)Reflection: angle of reflection equals angle of refraction
c.) Refraction: light travels in a more dense medium
3.) State 2 properties of light that Newton couldn't explain very well with his particle model.
-Difraction -Partial reflection/ refraction
4.) (about your choosen scientists)
5.)
6.) (c.) wavelength of light
7.) (a.) electromagnetic wave
8.)
9.) Einstein stated that light was not transmitted as a continuous wave. He proposed light was transmitted as a photon and his famous experiment was the photoelectric effect.
10.) wave, then particle.
Alsoo on friday we took down notes :) ....
Kinematics
Scalars - number, unit
-distance
-temperature
- time
- speed
-mass
-energy
Vectors
- number, unit + direction
- position
- displacement
-velocity
- force
- weight
- acceleration
Time
Instantaneous time: clock reading
Time interval: difference between 2 clock readings
After taking down notes we were given a short worksheet and then we corrected it.
....that was all for friday.
-----Monday, November 17, 20008-----
Todays class we just did lab. Actually half of the class did lab and others, worked on worksheets that we were given. The lab was just to try and experience how the position time graph goes.
Ohh yeah..... in the end of the class were told to hand in the worksheet that were given for homework last friday. thats pretty much all we did :) kaaay see you all tomorrow!!
THE NEXT SCRIBE : yvanne dandan.
In physics class, we corrected the test on the supporting arguments of both particle and wave theories of light. It was out of 30 and it was calles Nature of Light II.... here are the corrections :
1. a.) Rectilinear Propagation: Light travels in straight lines, and its very fast.
example: a ball thrown quickly travels straight.
b.) Reflection: angle of reflection equals angle of refraction.
c.) Refraction: Light moves slower on a less dense medium.
2.a.) Rectilinear Propagation:
b.)Reflection: angle of reflection equals angle of refraction
c.) Refraction: light travels in a more dense medium
3.) State 2 properties of light that Newton couldn't explain very well with his particle model.
-Difraction -Partial reflection/ refraction
4.) (about your choosen scientists)
5.)
6.) (c.) wavelength of light
7.) (a.) electromagnetic wave
8.)
9.) Einstein stated that light was not transmitted as a continuous wave. He proposed light was transmitted as a photon and his famous experiment was the photoelectric effect.
10.) wave, then particle.
Alsoo on friday we took down notes :) ....
Kinematics
Scalars - number, unit
-distance
-temperature
- time
- speed
-mass
-energy
Vectors
- number, unit + direction
- position
- displacement
-velocity
- force
- weight
- acceleration
Time
Instantaneous time: clock reading
Time interval: difference between 2 clock readings
After taking down notes we were given a short worksheet and then we corrected it.
....that was all for friday.
-----Monday, November 17, 20008-----
Todays class we just did lab. Actually half of the class did lab and others, worked on worksheets that we were given. The lab was just to try and experience how the position time graph goes.
Ohh yeah..... in the end of the class were told to hand in the worksheet that were given for homework last friday. thats pretty much all we did :) kaaay see you all tomorrow!!
THE NEXT SCRIBE : yvanne dandan.
Thursday, November 13, 2008
NOVEMBER 13, 2008.
In today's physics class, we had a short test on the supporting arguments of both particle and wave theories of light, a scientist who contributed to the current knowledge of light, and Young's experiment. The test was out of 30 marks.
Near the end of the period, we were given booklets entitled "kinematics", which is just a couple of pages long. I think i remember Mrs. Kozoriz saying that it was review from grade 10? I'm not sure. Buuuut, that's basically all we did this class.
See you guys tomorrow :]
PS. The next scribe is going to be.. Erica.
Near the end of the period, we were given booklets entitled "kinematics", which is just a couple of pages long. I think i remember Mrs. Kozoriz saying that it was review from grade 10? I'm not sure. Buuuut, that's basically all we did this class.
See you guys tomorrow :]
PS. The next scribe is going to be.. Erica.
Nature of Light Part 2
Sorry, I forgot to blog yesterday...
So what we did yester day was just a review for the test today.
Topics:
Newton's Corpuscular Theory
Wave Theory of Light
Young's Experiment
The Photoelectric Effect
The Principle of Complementarity and Light
For the test you should be able to:
- know the supporting and counter arguments for the particle and wave theories of light:
Rectilinear Proopagation
Reflection
Refraction
Dispersion
Diffraction
Partial Reflection/Refraction
Speed of Light
-The Different Scientists that contributed to our current knowledge of light:
Galileo, Roemer, Huygens, Fizeau, Foucault, Michelson
-The Equation from Young's Experiment
Wavelenght = ((x)(d))/L
where: x- distance between two successive
d- distance between the two slits
L- distance between the slits and the screen
The Next blogger is Dearly:-)
So what we did yester day was just a review for the test today.
Topics:
Newton's Corpuscular Theory
Wave Theory of Light
Young's Experiment
The Photoelectric Effect
The Principle of Complementarity and Light
For the test you should be able to:
- know the supporting and counter arguments for the particle and wave theories of light:
Rectilinear Proopagation
Reflection
Refraction
Dispersion
Diffraction
Partial Reflection/Refraction
Speed of Light
-The Different Scientists that contributed to our current knowledge of light:
Galileo, Roemer, Huygens, Fizeau, Foucault, Michelson
-The Equation from Young's Experiment
Wavelenght = ((x)(d))/L
where: x- distance between two successive
d- distance between the two slits
L- distance between the slits and the screen
The Next blogger is Dearly:-)
Monday, November 10, 2008
November 10, 2008
Hello everyone !! Ramina is here...
ahmm,..
Today, Ms. K was absent but we had a substitute teacher. Also, today we just work on our assignment and do some work that we have from other class..
Hmm,, today I'm gonna post the venn diagram that we did last week because Kim forgot to post it, so here...
Differences and Similarities Of Particle and Wave Model
also, we have a new classmate and her name is Faye ( I think.. ) eheheh
ahmm,, that's all we did.. If Ms. K ask me to do the scribe on wed. I'm willing to do it but if not the next scribe is Anthony N..... *__*
ahmm,..
Today, Ms. K was absent but we had a substitute teacher. Also, today we just work on our assignment and do some work that we have from other class..
Hmm,, today I'm gonna post the venn diagram that we did last week because Kim forgot to post it, so here...
Differences and Similarities Of Particle and Wave Model
also, we have a new classmate and her name is Faye ( I think.. ) eheheh
ahmm,, that's all we did.. If Ms. K ask me to do the scribe on wed. I'm willing to do it but if not the next scribe is Anthony N..... *__*
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