Bharat

/22/2010 = Electronics and Transmission = = Many different types of electronics function different ways and serve different pruposes. An analog signal remains the same throughout the transmission. This means the signal does not change and is recieved and displayed. A digital signal is sampled before it is recieved. Once the tranmission arrivesthe digital wave is transformed into numbers and stored. Semiconductors can be used in computers and other electronics becuaswe they only partially conduct heat and electricity. This means, that they can be switched on and off they can store energy then when switched off the can store it, this is the most effective way to build an electronic device. Diodes, convert AC- Alternating current to DC or direct current these can be useful if you need certain types of energy. A transistor works like a catalyst however, a transistor amplifies the energy. = = ﻿On a mission to mars all different types of computers and electronics will be needed. For one computers will be needed with semi conudctors. Computers like navigation and monitors for the flight will be imparitive. In addition if there aren't any electronics for the door and for the engines, the ship will be useless. Overall, a mission to mars is costly and there are a lot of things that could go wrong. =

Stuart: Well done, well done. (clap clap clap). I thought every thing was well put. I liked the way that you provided the information, while persuading your argument that electronics are important. I like how you approached this assignment as an argument, and persuaded it with a numerous amount of facts. Well done.

Ms. Mc. - Good overview of electronics and a good start on how we might use electronic devices on a mission to search for life on Mars, however, a few more specific examples would have been good. Please be sure to read over your entries for spelling and grammar before posting them too. 9/10

[[image:Chinese_Rocket_Drawing.jpg]]
Figure 1: A Chinese rocket.

Figure 2: A German rocket.
==Rockets have not only been around since 100 BC but have also shaped the world today by providing critical research and exploration information. Rockets and rocket science are some of the most intruiging aspects of science itself. The first rockets date back to the Greeks with Hero of Alexandria first thinking of usin steam power as a propulsion device. Also the Chinese made their first types of fireworks and explosivly propelled objects. These projectiles were used in battle and gave the Chinese a distinct advantage on the battlefield. The projectiles not only were terrifying but deadly because of their explosive force.==


 * Following these primitive rockets were modern rockets. These included Goddard's rocket who was named the father of Rockets because of his acheivments. Following Goddard were the Russians and Germans using liquid fueled propellants rather than solids. Finally, rockets are not onmly today used to explore the far reaches of space, but are once again finding their way onto the battlefield.//﻿// **

//**Ms. Mc - Good start but again, a little more detail would have been beneficial. Dates are especially important when discussing history. Please be sure to include a figure # and title for all photos/drawings and insert them in your work where you discuss them. Again, please check for spelling/grammar. 12/15** //

4/4/2011
media type="custom" key="8956110" ==

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Rocket Parts


The nose cone helps guide the rocket and makes it more streamline. The body is where most of the parts are packed inside. The engine is what propels the rocket up. The motor mount is where the engine is below. The fins also help guide the rocket. The launch lug is what attaches the rocket to the launch system. The parachuts system deploys when given a final burst from the engine, the recovery wadding helps this deploy.

//Ms. Mc: Good overall but a few errors. The motor mount holds the motor in place (-1/2). The parachute (sp. error - 1/2) system is really called the recovery system (-1/2) and allows for the safe return of the rocket to the ground (-1/2). The recovery wadding protects the recovery system from being burned (-1/2). Please take the time to read over your entries before posting and don't forget the captions (-1). 16.5/20//

Lab Write Up
The purpose of this experiment was to build a model rocket and launch it. Rocket models were built and launched. While each launch was different, the flight was affected by the weather. When first launched the rockets were affected by friction and gravity which were pulling the rocket down, however the thrust was enough to overcome these forces. At the apogee the parachute deployed and while air resistance was slowing the rocket's descent, gravity eventually overcame it. It was hypothesized that the greater the mass of the rocket, the less the apogee this is due to the fact that the greater the mass of an object, the greater affect gravity will have.

Two Answers for Astronomy
1. Quarks are the smallest elementary part of matter proven to exist by man; quarks combine to create slightly larger particles including neutrons and protons. There are six different types of quarks called up, down, charm, strange, top and bottom. Each is classified due to their electrical charge and their position when they form together. Figure 1 and 2 show the position of quarks and what they look like.

Figure 1

Figure 2

1. The universe is much older than our solar system. Figure 3 below is a computer generated infrared image of the galaxy. The reasoning behind the age difference is that our galaxy started forming a whole 3 billion years after the creation of the universe. Figure 2 below is the Andromeda galaxy with which the Milky Way (our galaxy) may collide.



F Figure 3



//Ms. Mc: Good overall, except you didn't explain why our solar system is not as old as the Universe (-1/2). Also, please be sure to include titles in your captions (-1/2). 9/10//

Programming
==Challenge 1 was to tes and see if the robot could navigate a simple driving course. The course was straight, right turn, straight, right turn, straight, 720 degree turn, display a smiley face and clap. The robot had to follow a line on the floor until it was perfect. == 

The first block tells the robot to turn on its microphones connected to port 2 and wait until it hears a sound above level 30. The second block tells the robot to activate servo motors b and c and move at 75 percent power for 3 rotations. The third block tells the robot to turn right 180 degrees which will actually make the robot turn 90 degrees using servo motors b and c at 28 percent power. The next block tells the robot to move forward 2 rotation at 50 percent power. The next block tells the robot to turn right 180 degrees which will actually make the robot turn 90 degrees at 30 percent power. Then, the following movement block tells the robot to move forward using servo motors b and c for 2.5 rotations. The final block tells the robot to turn 1440 degrees which will spin the robot twice. The robot will then clap and display a smiley face. The display and sound will come from internal programming and speakers.