Wednesday, April 6, 2011
Vibrations and Waves
While the concepts of vibrations and waves are becoming more clear, the way to determine the range of wavelengths still remains pretty difficult. Clearly, the formula representing velocity equals wavelength times frequency (v=wavelength*f) would be used, but coming up with a plausible answer is still difficult. Here's an example from the book Holt Physics, of the type of problem which I find puzzling: A piano emits frequencies that range from a low of about 28Hz to a high of about 4200 Hz. Find the range of wavelengths in air attained by this instrument when the speed of sound is 340 m/s. I figured that f1= 28 and f2=4200; v=340, making wavelenth=? I tried plugging these numbers into the formula (340=28*x and 340=4200*x) and came up with 150m and .99m, which do not make much sense. Any ideas on what I am doing incorrectly.
Thursday, August 19, 2010
Inacurate Measurements?
The usefulness of a mathematical model for predicting may be limited by uncertainties in measurements, or by neglect of some important influences. A very in history or English, there are many acceptable answers. However, this may not be true. As there are many systems of measurement and not all are exact, there may be multiple answers for the same mathematical question. Also, due to all the different systems of measurement like the metric system, the International System of Units, or the system America uses, it is difficult to completely convert each number, as one system may measure it in another way. Plus, within the one system of measurement, there may be different ways of describing the same thing. For example, in the American system, one person may say twelve inches, but another may say one foot. This can also cause some discrepancies.
For example, I recall being a young child and trying to convert centimeters into inches and my teacher told me that that was virtually impossible, as there would be so many decimal points to consider. Therefore, I rounded my answer. Many numbers are rounded or estimated, which makes other numbers inaccurate. Also, due to repeating decimals or decimals that do not end, it is virtually impossible not to round the number, thus making it that more difficult for the number to be completely accurate. Although the numbers may be close to exact, it is virtually impossible for them to be perfectly exact.
Questions to consider:
1. If a system were put in place so that every country had the same measurement system, would this end certain discrepancies?
2. Do rounded or estimated numbers make inaccurate measurements?
3. Is it possible to have a measurement that is always the same, no matter what system is used?
For example, I recall being a young child and trying to convert centimeters into inches and my teacher told me that that was virtually impossible, as there would be so many decimal points to consider. Therefore, I rounded my answer. Many numbers are rounded or estimated, which makes other numbers inaccurate. Also, due to repeating decimals or decimals that do not end, it is virtually impossible not to round the number, thus making it that more difficult for the number to be completely accurate. Although the numbers may be close to exact, it is virtually impossible for them to be perfectly exact.
Questions to consider:
1. If a system were put in place so that every country had the same measurement system, would this end certain discrepancies?
2. Do rounded or estimated numbers make inaccurate measurements?
3. Is it possible to have a measurement that is always the same, no matter what system is used?
QUESTIONS to CONSIDER about GAS
1. If gases did not act predictably, would there be a periodic table?
2. If gases are predictable, are solids and liquids also predictable?
3. Do gases always act in the same manner in a given volume or place, regardless of other factors?
4. If a gas acted unpredictably, would that lead to all new discoveries?
2. If gases are predictable, are solids and liquids also predictable?
3. Do gases always act in the same manner in a given volume or place, regardless of other factors?
4. If a gas acted unpredictably, would that lead to all new discoveries?
Monday, August 16, 2010
GASES Part 1
Gases respond in predictable ways to pressure, temperature, volume, and changes in number of particles. If gases were not predictable, there would be no periodic table. Scientists can normally predict, correctly, when a gas will react to certain changes, but so can people who are scientists. For example, almost everyone I know knows what will happen when you boil water; it will turn to vapor.
It is also well known that gas always turns to the form of its container. This means that is the container gas is in is round, the gas will fill up the entire round space. My father was telling me about an episode of “David Letterman” that he saw where a biker fueled his bike with soda cans. The soda was shaken up and the man blasted off. This was due to the pressure of the carbon in the cans.
(More on the topic to follow)
It is also well known that gas always turns to the form of its container. This means that is the container gas is in is round, the gas will fill up the entire round space. My father was telling me about an episode of “David Letterman” that he saw where a biker fueled his bike with soda cans. The soda was shaken up and the man blasted off. This was due to the pressure of the carbon in the cans.
(More on the topic to follow)
Thursday, August 12, 2010
CYCLES
In many physical, biological and social systems, changes in one direction tend to produce opposing, leading to repetitive cycles of behavior. This relates to how there are repetitive cycles to everything in the world. When there is a change in one cycle it will lead to an opposite cycle. This is true in really any cycle. In the physical world, this is similar to the process of precipitation. The precipitate or rain falls to the ground and is evaporated up into the air, where it is stored in a cloud. The cycle continues.
This also relates to positive and negative feedback loops, as learned in principle of biomedical sciences class. Feedback loops are cycles of behavior. They can be anything from cycles of electricity to cycles of blood in the body. Positive feedback loops change in a favorable way, meaning it is more of an expected result. Whereas in a negative feedback loop, the results are inverted.
Even life cycles are repetitive. Everything from human’s daily routine (we wake up, brush our teeth, eat breakfast go to work) to our histories (history repeats itself) are repetitive cycles. Therefore, everything is subject to the “domino effect.” One change causes an opposing behavior, restarting the cycle.
Questions to consider:
1. Does the change always produce an opposite; can there be a change with no repercussions?
2. Do all cycles break after some time?
3. Can a cycle be broken without using an opposing force?
This also relates to positive and negative feedback loops, as learned in principle of biomedical sciences class. Feedback loops are cycles of behavior. They can be anything from cycles of electricity to cycles of blood in the body. Positive feedback loops change in a favorable way, meaning it is more of an expected result. Whereas in a negative feedback loop, the results are inverted.
Even life cycles are repetitive. Everything from human’s daily routine (we wake up, brush our teeth, eat breakfast go to work) to our histories (history repeats itself) are repetitive cycles. Therefore, everything is subject to the “domino effect.” One change causes an opposing behavior, restarting the cycle.
Questions to consider:
1. Does the change always produce an opposite; can there be a change with no repercussions?
2. Do all cycles break after some time?
3. Can a cycle be broken without using an opposing force?
Thursday, July 29, 2010
RELATIVE FRAME of MOTION- Conversation 1
Conversation 1:
All motion is relative to whatever frame of reference is chosen, for there is no motionless frame from which to judge all motion. Due to the tilt of Earth’s axis, there is constant movement on Earth. However, since every part of earth will move in a separate direction, everything moves differently. In addition, most living organisms can move freely, thus making it difficult to completely study the exact movements of all. Since, each moves at a different pace, and this also depends on the area of the earth they are on, there is no set frame of motion. Nothing is ever completely motionless. No two are ever exactly the same, so there cannot be a set frame to judge anything, let alone motion.
Each part of the world has a different frame of reference, as proven by how in other countries and continents, water comes flows in the opposite direction than it does in America. There are many frames of reference for measuring everything. Even for length alone, there is feet, inches, meters, miles, etc. Therefore, there is really no set frame of measurement for anything.
People all have different opinions. Therefore, one thing may look differently to one person than to another. One person may see one object move in a certain way, but another may see it move completely differently.
Questions to consider:
If there is no relative frame of motion, is there really any true frame of measurement for anything?
Why do certain people see some things one way and others see it completely differently?
If everyone could agree on one relative frame of motion, would that become a true measurement?
In many physical, biological and social systems, changes in one direction tend to produce opposing (but somewhat delayed influences), leading to repetitive cycles of behavior.
(http://officespam.chattablogs.com/archives/oldgirl.gif)
http://officespam.chattablogs.com/archives/oldgirl.gif
http://anexplorationofourworld.blogspot.com/2010/07/welcome.htmls
All motion is relative to whatever frame of reference is chosen, for there is no motionless frame from which to judge all motion. Due to the tilt of Earth’s axis, there is constant movement on Earth. However, since every part of earth will move in a separate direction, everything moves differently. In addition, most living organisms can move freely, thus making it difficult to completely study the exact movements of all. Since, each moves at a different pace, and this also depends on the area of the earth they are on, there is no set frame of motion. Nothing is ever completely motionless. No two are ever exactly the same, so there cannot be a set frame to judge anything, let alone motion.
Each part of the world has a different frame of reference, as proven by how in other countries and continents, water comes flows in the opposite direction than it does in America. There are many frames of reference for measuring everything. Even for length alone, there is feet, inches, meters, miles, etc. Therefore, there is really no set frame of measurement for anything.
People all have different opinions. Therefore, one thing may look differently to one person than to another. One person may see one object move in a certain way, but another may see it move completely differently.
Questions to consider:
If there is no relative frame of motion, is there really any true frame of measurement for anything?
Why do certain people see some things one way and others see it completely differently?
If everyone could agree on one relative frame of motion, would that become a true measurement?
In many physical, biological and social systems, changes in one direction tend to produce opposing (but somewhat delayed influences), leading to repetitive cycles of behavior.
(http://officespam.chattablogs.com/archives/oldgirl.gif)
http://officespam.chattablogs.com/archives/oldgirl.gif
http://anexplorationofourworld.blogspot.com/2010/07/welcome.htmls
Monday, July 26, 2010
RELATIVE FRAME of MOTION
I'll be blogging about relative frame of motion soon, but let me leave you with this first:
People all have different opinions. Therefore, one thing may look differently to one person than to another. One person may see one object move in a certain way, but another may see it move completely differently. Therefore, it is not possible to have an exact frame of motion. This is how those optical illusions, like the one at the Ripley’s Believe It or Not Museum works. When I went there with my parents, we saw this drawing of a lady. I called my parents over to the picture to show them the senior citizen in the picture. My mother did not know what I was talking about, because she saw the lady in the drawing as a young lady. My dad saw an old lady, too. Therefore there would be no real way to tell which it is. This is just like the frame of motion that an object may have in regards to how it moves and there is no frame of reference.
To see the pdrawing of the young/old lady, go to:
http://officespam.chattablogs.com/archives/oldgirl.gif
People all have different opinions. Therefore, one thing may look differently to one person than to another. One person may see one object move in a certain way, but another may see it move completely differently. Therefore, it is not possible to have an exact frame of motion. This is how those optical illusions, like the one at the Ripley’s Believe It or Not Museum works. When I went there with my parents, we saw this drawing of a lady. I called my parents over to the picture to show them the senior citizen in the picture. My mother did not know what I was talking about, because she saw the lady in the drawing as a young lady. My dad saw an old lady, too. Therefore there would be no real way to tell which it is. This is just like the frame of motion that an object may have in regards to how it moves and there is no frame of reference.
To see the pdrawing of the young/old lady, go to:
http://officespam.chattablogs.com/archives/oldgirl.gif
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