Carter

Log Entry 1

El ce tronics and Computers
==== In this entry, I will talk about what I have learned about the different things that are in everyday things that everyone uses. Like TV's, lamps, microwaves and much more. LIke the difference between analog and digital signals, how semiconduc x tors are useful in electronic devices, or how are diododes, transistors and integrated circuits used? Th se s are the things that will be mentioned in this Log entry. ====

==== ﻿The difference between analog signals and digital signals are that a digital signal doesn't vary in terms of smoothness, it varies in terms of jumps or steps. Semiconductors could be useful if the object that the batteries are powering doesn't need the full amount of voltage that is produced. Diodes are used for protection, a transistor can be used for controling the flow of electricity within the object, and an integrated curcuit has circuits in them which are in a semiconductor metal of usually silicon. All of theses materials are being used in out mission to m ars. The analog signal are used for the speed of the craft air pressure and how much air are in the space craft. There are digital devices that we will be using to scan the area to be able to see any signs of life. We will also be using digital devices to discover new minerals if there are any more to be found. And also it is better to use analog devices in space in case there is a random el ce trical wave that the ship encounters. The semiconductors, diod e s, transistors, and integrated circuits will all be on the space ship for me and my crew to survive. ==== ==== // Ms. Mc: Good general overview of electronics. The second paragraph was to describe specific electronic devices (machines that use electronic components in circuits to perform a job) that we would use on an un-manned mission to Mars (like NASA, we are sending up a rover) such as: computers, navigation systems, communication systems, cameras, soil analyzers, solar panels, etc. Please create your work in Word and run spell check and read over your work for spellinga and grammar errors before posting. 7.5/10 // ====

4/6/11 History of Rockets
==== Over the past few weeks we have begun to research the rockets that we are in. Like below there is a picture of the Hero Engine. There is so much more to rocketry than most people think. I am here to talk about the history of rockets. ==== ==== The hero engine was the early form of an engine. It was the first ever propulsion engine, or at least a ball, pot, and fire that involved propulsion through steam. It was an engine that would heat up water causing it to vaporize. This water was sent in to a ball and released through two different nozzles. They were pointing in directions that would cause the ball to spin. ====

The Chinese Rockets were the first Rockets used in warfare. This completely changed the battle field for almost every country in the world. They used gunpowder-fuled rockets attached to arrows. I mean without that there would be no modern weapons of Mass destruction. One of the Great Founding Fathers of Rocketry was Konstantin Tsiolkovsky. Without him there would be no rocketry. Imagine if by now no living being could have gone to the moon let alone space itself. He was one of the critical people for rockets along with Hermann Oberth and Robert H. Goddard. Speaking of Goddard, he was the first one to achieve building a working liquid fuled rocket. This rocket was launched on March 16, 1926. Now back to weapons. The V-2 rocket was the first motorized rocket that was partially self-guided. It was used in World War II. This devastating rocket was the basic nuclear bomb of the century. It caused turmoil and h avoc throughout England. Another important thing with rocketry, are the organization that launches them. The reason this semi branch of the government was formed was due to the great space race. This happened between the Americans and the Russians. It was to see who would be the first nation to go into space.



Figure 2- V2 Rocket
//Ms. Mc: Good general summary of the history of rocketry but when discussing history, it's important to give specific dates and give credit (the names) to thoses who made the discoveries. What has NASA done since being created? Your diagrams are helpful. Please insert them in your text when you discuss them and refer to them specifically ("as seen in Figure 1 . . . "). 12.5/15//

4/4/11 Scratch Project: Rocket Simulation
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Instructions: Press Green Flag to go and the Stop sign to stop it. And make sure that your computers sound is turned up.

4/14 Rocket Launch
In the flight of a rocket there are many things that are involved. First there is a nose cone. This part of the rocket is used for cutting through the wind aerodynamically. Then there are the fin in which the rocket uses to stay on or change course. There is another part of the rocket that is used for trajectory. This is the launch lug. This is used for making sure the rocket gets off of the liftoff area nice and straight. Now moving along to the propulsion of the rocket. The main part of the propulsion system is the actual motor. This is used for getting the rocket off of the launch pad. The object that holds the motor in place is the motor mount, with out it the motor would fly off. For the safety of the rocket there is Recovery Wadding. This is used for making sure the engine doesn't damage the recovery system. Last but certainly not least, probably the most important part of the rocket is the recovery system. This is use for making sure that the rocket safely makes it back to earth by using a parachute.



Figure 3: Rocket with Parts Named

Ms. Mc: Good labels and definitions. The recovery wadding and the motor mount also are inside (-1). You forgot to define the body tube (-1). Please make the entry title a little more specific to what the entry is about (-1/2). 17.5/20

4/18-Introduction and Results:
** Introduction- ** In this experiment the group tried to figure of does the mass of the rocket affects the rockets apogee? During this experiment many different forces acted upon the rocket. There was the gravity, the force of the engine, the force of the launch pad, and the force of the tree the rockets landed in. It was hypothesized that the lighter the rocket the farther the rocket would go. This was true in one example. The lightest rocket went the farthest. But that was the only piece of the data that was true with the hypothesis. The other rockets were not along with the hypothesis.

Figure 4- Scatterplot of the Data of the Rocket

**Results-**
The results of the experiment were incunclusive due to the fact that the data had no relationship. This outcome was due to the fact that the rockets were because the results show had no realtionship in terms of the mass affect the rocket. An example was the heaviest rocket wasn’t in last. In fact one of the lighter rockets was in last. So of the errors could have been the weather, human error, or it was falty equipment. There were so many possibilites for error throughout the flight. The other important point was the fact that there was only seven pieces of data. It would have been better on a bigger scale.

**Log Entry 6: Astronomy 4/26**
Which is Older the Univers or our solar system. Our universe is younger because our solar system was formed when one other solar system crashed into our solar system. Hence the Universe is older. This is found because we are a spiral galaxy and they form when one othere galaxy crashes into another galaxy. How did our Moon come to revolve around the Earth? This is because one smaller planet crashed into Earth causing the Moon to be created. After that the Moon was caught in out gravitational pull and it is still there today.



Figure 4: Big Bang

Figure 5: The Moon

//Ms. Mc: You need more details/facts in your answers. If you are talking about ages you should give numbers (-1). How specifically was the moon created when the planetesmal crashed into Earth? (-1). You also were to refer directly to the figures and explain them in your text and I don't really see how the picture of the moon you (1.5). Please read over your entries for spelling and grammar errors (-1/2). 6/10//

**LOG PROMPT #8 5/6 Deciphering What Each of the Programming Blocks Mean**
The program that we will be used during this assignment, is the "On The Edge Program". The programming blocks that were used were the moving blocks and the different variations of the wait blocks.

The first block is a wait block. It makes the robot wait. This is the wait block that waits for a sound to continue the rest of the actions already set into the programming area. When a person says "GO" the robot will start to move. The block was set so that if the sound level reached above fifty the robot would continue the rest of the actions. The second block is move block. This block was set to get the servo motors to move the robot forward at 75% power for an unlimited amount of time. It makes the robot move forward. The third block is the other variation of the wait block. It waits for light. It is set that if the light sensor goes below a certain degree of color on the UV spectrum, the robot would do a different action. When the lights sensor senses the blue tape the robot will commit the next action. The fourth block is another move block, But this block is set to stop the servomotors. It makes the robot stop. And finally the last block is a sound block. It plays the sound file of watch out from the Brick. It makes the robot say watch out.



Figure: 6- The Blocks used to Program Motors