http://en.wikipedia.org/wiki/World_of_Illusion_Starring_Mickey_Mouse_and_Donald_Duck
This is definitely the game I played as a kid with Mickey Mouse! This game was awesome
Saturday, July 30, 2011
Wednesday, July 20, 2011
http://en.wikipedia.org/wiki/AM_broadcasting
AM Radio is in the frequency range of 500 kHz to 1 MHz
Explanation for how radio signals are detected "An AM receiver detects amplitude variations in the radio waves at a particular frequency. It then amplifies changes in the signal voltage to drive a loudspeaker or earphones. The earliest crystal radio receivers used a crystal diode detector with no amplification."
I don't think radio waves have a voltage...maybe power differences?
Author: Date Written: Title: Subject Area: Source Website: ---Summary--- ---My Reaction--- ---Questions---
AM Radio is in the frequency range of 500 kHz to 1 MHz
Explanation for how radio signals are detected "An AM receiver detects amplitude variations in the radio waves at a particular frequency. It then amplifies changes in the signal voltage to drive a loudspeaker or earphones. The earliest crystal radio receivers used a crystal diode detector with no amplification."
I don't think radio waves have a voltage...maybe power differences?
Author: Date Written: Title: Subject Area: Source Website: ---Summary--- ---My Reaction--- ---Questions---
Sunday, July 3, 2011
learning html, css
Here is a link to a website for learning html, css
http://www.w3schools.com/
Daren recommending css and mentioned how it makes it easier to redo operations, such as style changes to a page. He said that once you make a style change to one page, you can apply that to any other page.
http://www.w3schools.com/
Daren recommending css and mentioned how it makes it easier to redo operations, such as style changes to a page. He said that once you make a style change to one page, you can apply that to any other page.
Lightning is Cool
Except if it makes the power go out. I should look up the properties of lightning, what makes it so bright, and why it crease thunder. Looking up lightning on wikipedia...
from http://hyperphysics.phy-astr.gsu.edu/hbase/electric/lightning2.html,
In a lightning bolt can have a peak current around 30,000 A. For some perspective, a washing machine (http://wiki.answers.com/Q/How_much_amperage_does_a_washing_machine_draw) draws about 10 A, so this is 3,000 more current than a washing machine draws. Also, a lightning bolt jumps a potential difference on the order of 100 million volts.
P= I*V, so the power dissipated by a lightning bolt can be on the order of a trillion watts, although this website says that this value is on the order of 100 million watts. I do not know where this calculation came from, but this is a lot.
Okay, I was looking to compare the power output of a lightning bolt, and I found just what I was looking for
http://en.wikipedia.org/wiki/Orders_of_magnitude_%28power%29
The peak power output of a lightning bolt can be up to 1 terawatt, which is roughly 1000 times the power output of the hoover dam, and 10 times the power consumption of Great Britain in 2008. The peak power output of a lightning bolt occurs during a stroke which lasts only for several microseconds. Thus, the total energy transferred in this process is on the order of a Giga Joule, which, interestingly enough, according to
http://en.wikipedia.org/wiki/Orders_of_magnitude_%28energy%29
is equal to the amount of energy expanded by a human heart over an 80 year time frame.
According to
http://hyperphysics.phy-astr.gsu.edu/hbase/electric/lightning2.html
again, a lightning strike lasts about 0.2 seconds, but is composed of several, much shorter flashes (on the order of 1 ms) called strokes.
Also, the leader of a lightning bolt can reach speeds of 220,000 km/h, or about 60,000 m/s, which is pretty fast. The leader of a lightning bolt also reaches temperatures around 30,000 degrees Celsius. The surface temperature of the Sun (look up Sun on wikipedia) is about 5500 degrees C. I don't quite know what this tells you, other than that 30,000 degrees C is very hot.
Okay, I got distracted into looking up what absolute luminosity is for a star. BY THE WAY, IF I DON'T MENTION A LINK, I am just reading the wikipedia article. Absolute luminosity is the luminosity a star would have if it were 10 parsecs away, with a parsec being about 3 light-years.
A question I have had on my mind that I should have known the answer to is how astronomers find the distance to stars. They find it by using parallax! Which, is a method in which a telescope on Earth looks at an object, and notes its relationship to the background stars to the object. Then, astronomers wait 6 months later, when the Earth is on the opposite side of its orbit, and measure the relationship of the object with the background stars again. Being close, the object should have a slightly different relationship to the background stars. This is the same effect you can see when driving by an open-field, when a nearby sign appears to move by much more quickly than a hillside off in the distance.
Anyway, I also wanted to look up how thunder is generated
The large increase in pressure and temperature caused by the lightning strike causes air around the lightning strike to expand very quickly. This creates a sonic shock wave, which is thunder. Sonic booms arise do to objects travelling at or faster than the speed of sound. What happens is that the pressure wave, or sound wave, created by the object moving faster than sound is all compressed into one large, intense wave front, as the object is continuously pressing new wavefronts together. Animations on this website are quite good for showing how a shock wave forms
http://www.kettering.edu/physics/drussell/Demos/doppler/doppler.html
Anyway, I have been at this for a long time. Adios
there is a cool link to Ball Lightning, which reportedly is a ball of lightning that propagates slowly through the sky, like some wondering orb. It does not sound like there have been any certain events in which ball lightning has been witnessed, but there have been cases reported of it in several places, including a lighthouse in Australia, a religious building in India, and a region in the Netherlands. Here is an excerpt of the story on ball lightning from the lighthouse in Australia
"All this happened a few years ago at Cape Naturaliste lighthouse, which stands high on the hill, the ocean all round, on three sides. The three cottages are at the bottom of the hill below the lighthouse.
It was July 1907 when we experienced the impact of the fire ball. Father was the only one on duty, the time was 9.00am one of the Assistant Lightkeepers had gone 25 miles to the small town of Busselton, for supplies and food for the three families. The second Assistant had gone to Yallingup Cave House to collect all the postal mail, papers etc. for the lighthouse which was collected once a week.
It was 8.30am, a storm had been raging for 5 days, then it turned into a severe electric storm with terrible flashes of lightning and thunder which was deafening, then everything went quiet all of a sudden. We were standing looking out of the window facing North East, wondering if we could now go outside. It became very dark, then a large red ball of fire slowly appeared on the horizon. We watched it as it slowly moved towards us, the air became very warm. We were very frightened and then as it came closer, Mother quickly pushed we children under the beds. She got under a heavy dining room table, only just in time an the fire ball struck our house, breaking windows, the telephone rang violently, then it burst from the wall with a loud explosion, the noise was terrible. Mother became worried as Father was on duty up at the lighthouse. She put a coat on and rushed out leaving us screaming under the beds, to see if Father was safe. The pathway was all ripped up, to a depth of approximately 4' along the underground phone line from our house to the lighthouse. The wind was so strong that it almost knocked Mother over.
When she reached the lighthouse and went upstairs, on to the first landing, things were in a mess. Father said later that he put his hand on the phone to put through a weather report, and it blew up and out from the wall, knocking my Father unconscious. A long large cupboard, which was strongly bolted with long bolts to the wall, was blown from the wall. It had a lightning conductor running up the wall behind the cupboard from the ground to the top of the lighthouse dome and outside. This was twisted and torn. Everything was tossed and smashed up, that had been in the, path of the fire ball. It was terrible.
After the fire ball struck, there was loud thunder and lightning, like hell let loose for about an hour. Then the severity of the storm subsided and it became very quiet. Very heavy rain came down and lasted for a few hours, slowly stopping. Then everything cleared, the sun shone through and it looked so peaceful with raindrops glistening on trees and flowers.
The absence of the two keepers placed a heavy burden on Mother. We two children were her only helpers at the time. so she sent us two miles to ask the Farmer, Mr. Curtis, for help. He had to ride horseback twelve miles to Caves House, Yallingup, to the nearest 'phone, for help from Busselton
A doctor had to be brought 25 miles to the lighthouse. We were cut off with no 'phones. Father was ill and had a long cut on his head which had to be sutured up (stitched). Mother was also suffering from shock. Father was ill for eight weeks and off duty.
It's surprising the amount of damage a fire ball causes, when it strikes its terror and I never want to see another one. It left us all in a highly nervous condition for come time and every time there was a bad storm we were all terrified an to what would happen next. In the years to follow, we had many severe storms in the winter, but we never saw another fire ball, which seems to be something that rarely happens.
It takes years to overcome the fear of storms. "
from http://hyperphysics.phy-astr.gsu.edu/hbase/electric/lightning2.html,
In a lightning bolt can have a peak current around 30,000 A. For some perspective, a washing machine (http://wiki.answers.com/Q/How_much_amperage_does_a_washing_machine_draw) draws about 10 A, so this is 3,000 more current than a washing machine draws. Also, a lightning bolt jumps a potential difference on the order of 100 million volts.
P= I*V, so the power dissipated by a lightning bolt can be on the order of a trillion watts, although this website says that this value is on the order of 100 million watts. I do not know where this calculation came from, but this is a lot.
Okay, I was looking to compare the power output of a lightning bolt, and I found just what I was looking for
http://en.wikipedia.org/wiki/Orders_of_magnitude_%28power%29
The peak power output of a lightning bolt can be up to 1 terawatt, which is roughly 1000 times the power output of the hoover dam, and 10 times the power consumption of Great Britain in 2008. The peak power output of a lightning bolt occurs during a stroke which lasts only for several microseconds. Thus, the total energy transferred in this process is on the order of a Giga Joule, which, interestingly enough, according to
http://en.wikipedia.org/wiki/Orders_of_magnitude_%28energy%29
is equal to the amount of energy expanded by a human heart over an 80 year time frame.
According to
http://hyperphysics.phy-astr.gsu.edu/hbase/electric/lightning2.html
again, a lightning strike lasts about 0.2 seconds, but is composed of several, much shorter flashes (on the order of 1 ms) called strokes.
Also, the leader of a lightning bolt can reach speeds of 220,000 km/h, or about 60,000 m/s, which is pretty fast. The leader of a lightning bolt also reaches temperatures around 30,000 degrees Celsius. The surface temperature of the Sun (look up Sun on wikipedia) is about 5500 degrees C. I don't quite know what this tells you, other than that 30,000 degrees C is very hot.
Okay, I got distracted into looking up what absolute luminosity is for a star. BY THE WAY, IF I DON'T MENTION A LINK, I am just reading the wikipedia article. Absolute luminosity is the luminosity a star would have if it were 10 parsecs away, with a parsec being about 3 light-years.
A question I have had on my mind that I should have known the answer to is how astronomers find the distance to stars. They find it by using parallax! Which, is a method in which a telescope on Earth looks at an object, and notes its relationship to the background stars to the object. Then, astronomers wait 6 months later, when the Earth is on the opposite side of its orbit, and measure the relationship of the object with the background stars again. Being close, the object should have a slightly different relationship to the background stars. This is the same effect you can see when driving by an open-field, when a nearby sign appears to move by much more quickly than a hillside off in the distance.
Anyway, I also wanted to look up how thunder is generated
The large increase in pressure and temperature caused by the lightning strike causes air around the lightning strike to expand very quickly. This creates a sonic shock wave, which is thunder. Sonic booms arise do to objects travelling at or faster than the speed of sound. What happens is that the pressure wave, or sound wave, created by the object moving faster than sound is all compressed into one large, intense wave front, as the object is continuously pressing new wavefronts together. Animations on this website are quite good for showing how a shock wave forms
http://www.kettering.edu/physics/drussell/Demos/doppler/doppler.html
Anyway, I have been at this for a long time. Adios
there is a cool link to Ball Lightning, which reportedly is a ball of lightning that propagates slowly through the sky, like some wondering orb. It does not sound like there have been any certain events in which ball lightning has been witnessed, but there have been cases reported of it in several places, including a lighthouse in Australia, a religious building in India, and a region in the Netherlands. Here is an excerpt of the story on ball lightning from the lighthouse in Australia
"All this happened a few years ago at Cape Naturaliste lighthouse, which stands high on the hill, the ocean all round, on three sides. The three cottages are at the bottom of the hill below the lighthouse.
It was July 1907 when we experienced the impact of the fire ball. Father was the only one on duty, the time was 9.00am one of the Assistant Lightkeepers had gone 25 miles to the small town of Busselton, for supplies and food for the three families. The second Assistant had gone to Yallingup Cave House to collect all the postal mail, papers etc. for the lighthouse which was collected once a week.
It was 8.30am, a storm had been raging for 5 days, then it turned into a severe electric storm with terrible flashes of lightning and thunder which was deafening, then everything went quiet all of a sudden. We were standing looking out of the window facing North East, wondering if we could now go outside. It became very dark, then a large red ball of fire slowly appeared on the horizon. We watched it as it slowly moved towards us, the air became very warm. We were very frightened and then as it came closer, Mother quickly pushed we children under the beds. She got under a heavy dining room table, only just in time an the fire ball struck our house, breaking windows, the telephone rang violently, then it burst from the wall with a loud explosion, the noise was terrible. Mother became worried as Father was on duty up at the lighthouse. She put a coat on and rushed out leaving us screaming under the beds, to see if Father was safe. The pathway was all ripped up, to a depth of approximately 4' along the underground phone line from our house to the lighthouse. The wind was so strong that it almost knocked Mother over.
When she reached the lighthouse and went upstairs, on to the first landing, things were in a mess. Father said later that he put his hand on the phone to put through a weather report, and it blew up and out from the wall, knocking my Father unconscious. A long large cupboard, which was strongly bolted with long bolts to the wall, was blown from the wall. It had a lightning conductor running up the wall behind the cupboard from the ground to the top of the lighthouse dome and outside. This was twisted and torn. Everything was tossed and smashed up, that had been in the, path of the fire ball. It was terrible.
After the fire ball struck, there was loud thunder and lightning, like hell let loose for about an hour. Then the severity of the storm subsided and it became very quiet. Very heavy rain came down and lasted for a few hours, slowly stopping. Then everything cleared, the sun shone through and it looked so peaceful with raindrops glistening on trees and flowers.
The absence of the two keepers placed a heavy burden on Mother. We two children were her only helpers at the time. so she sent us two miles to ask the Farmer, Mr. Curtis, for help. He had to ride horseback twelve miles to Caves House, Yallingup, to the nearest 'phone, for help from Busselton
A doctor had to be brought 25 miles to the lighthouse. We were cut off with no 'phones. Father was ill and had a long cut on his head which had to be sutured up (stitched). Mother was also suffering from shock. Father was ill for eight weeks and off duty.
It's surprising the amount of damage a fire ball causes, when it strikes its terror and I never want to see another one. It left us all in a highly nervous condition for come time and every time there was a bad storm we were all terrified an to what would happen next. In the years to follow, we had many severe storms in the winter, but we never saw another fire ball, which seems to be something that rarely happens.
It takes years to overcome the fear of storms. "
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