Owen

 Owen
=There are two types of signals; analog and digital. An analog signal varies smoothly over time, a digital signal on the other hand has jumps and skips in it. Semiconductors are used in electronic devices to limit the flow of electric signals. A diode is used to allow electricity to flow in one direction. a transistor amplifies electric signals and is also a switch that can be turned on or off. =  In a space mission to mars electronics would be helpful because they can use different types of signals to looks for life. a computer can search for specific signals and qualities of basic life. a computer would be able to search the plant a lot faster than a human, humans can't even get to mars yet anyway so computers are the only option. Radar would work too.

Read the document entitled “Simple Circuitry: An Introduction to Electricity and Circuits”; this document was emailed to you. In a series of paragraphs, summarize the following: · Why some atoms allow electricity to flow and some do not. · What is necessary for electricity to flow? · An explanation of what voltage, current and resistance are. Additionally, include the units used to measure them. · An explanation of how electricity flows in a circuit. · A description and comparison of series and parallel circuits.
 * Search for Life on Mars Mission (SLMM) – Entry 2 **

Additionally, besides summarizing the reading choose two pictures from the reading, save them to your hard drive, upload them to the Wikispace and insert them into this Wikipage entry.

Certain atoms allow electrons to flow freely and others don't. Those that do have energy shells that aren't filled up. For electricity to flow it is necessary for there to be free electrons or electrons that are not tightly bonded to a nuclei.

Voltage is how strong of a current of electricity there is. A current is the flow of electricity. Resistance is the limitation of the flow of electricity. Electricity flow in a circuit from the negative terminal of a battery to the positive. Any appliance it finds on the circuit it will go through that before returning to the circuit. Appliances in series along a circuit means that they are on the same path so if one burns out or is tuned off the other will stop working too. If appliances are in parallel they are on different paths and it one fails or is turned off the other will still work.

[[image:opf_seriescurcuit.jpg caption="a circuit in series"]] [[image:opf_parralelcurcuit.jpg caption="a circuit in parallel "]]
== Entry 3 Rockets started out as a weapon. probably first developed by the Chinese. they were not very accurate or effective. later on Eroupians developed more accurate and effective rockets. More modern rockets have explosive war heads in the top. space rockets drop off the shuttle after lift off. rockets have evolved over time. Kanatantin Tsiolkovsky suggested rockets be used for space eploration using liquid propelents. == 

 Rocket Simulation media type="custom" key="5930823" INSTRUCTIONS this is a simulation of a rocket flight. to start the simulation press green flag to stop press red octagon This has a sound so turn on your sound

my model rocket Part Definition The nose cone effects rocket flight by being aerodynamic. The body tube hold the rocket together and is also aerodynamic. the recovery system save the rocket from a gruesome landing, the recovery wading keeps the recovery system from burning up. The launch lug guides the rocket off the pad. the motor mount holds the motor in place. the fins guide the rocket and keep its flying.

 The goal is this experiment was to find in the rocket mass affected is apogee. Once a rocket lifts off and its thrust has stopped moving the rocket the rocket continues to fly using inertia. After thrusted flight the only force acting on the rocket is gravity which will eventually over come the rocket’s inertia. At the point in which this inertia is overcome is the apogee. It was hypothesized that if a lighter rocket is launched it will have a higher apogee because it has less inertia to overcome on the launch pad. This was thought because a lighter rocket has less inertia to overcome there for leaving more fuel for powered flight and leading to a higher apogee. On the launch pad gravity and the force of the launch pad are keeping the rocket in place. Once lift off happens the thrust’s force is greater than gravity and air resistance which pushes te rocket upward. After the rocket runs out of fuel only gravity and air resistance are forces acting on it but it still moves due to inertia. In this experiment rockets were launched each with a different mass. The goal of the experiment was to prove that the mass of a rocket affects its apogee. The rocket masses ranged from 41.1 grams to 46 grams. During the experiment rockets were launched and the angle was measured by people with angle guns 100m away. The data showed there was a general relation between the mass of the rockets and their apogee. In general the rockets with a lighter mass went higher showing an inverse relationship. The apogees varied greatly from rocket to rocket. For example rocket #1 had a mass of 41.4g and went the highest. The heaviest rocket, #7, had a mass of 46g and went the lowest. It was found that except for two outliers that the hypothesis was correct. The two lightest rockets went 5th and 6th highest because one of the angle guns was tighter making the angle lower.

[[image:OPF_Rocketgraph.jpg]]
 SLMM – Entry 6  Robotics History Conduct your own research on the history of Robotics. Then, in two or more paragraphs, summarize your research. Include at least 2 pictures that you have uploaded to supplement your written work. Don't forget to give them a figure # and title and refer to them in your paragraphs (i.e., "As seen in Fig. 1 . . .). Your final log entry should contain:

1) The date of your entry. 2) A 2 paragraph summary of robot history (can be longer). 3) 2 reasonable sized pictures (see entry 2 below for more information). 4) Correct spelling & grammar. _ __5/2/10- Robots are computer-controlled machines that are programmed to move, manipulate objects, and do work. Robots are able to do repetitive tasks quicker, and more accurately than people. The term robot comes from the Czech word robota, which means “compulsory labor.” The word robot has been used to refer to a machine that performs work to help people or do work that humans find difficult or undesirable. In the early 1800’s mechanical puppets were built in Europe, for entertainment. These were called robots becuase there parts were driven by linkings and cameras. In 1801 Joseph Maria Jacquard invented the automatic draw loom. The draw loom would punch cards and was used to control the lifting of thread in fabric factories. This was the first thing to be able to store a program and control a machine. After that there were many small changes in robotics.

The first industrial robots were developed by George Devol and Joe Engelberger in the late 50’s and early 60’s. The first patents were by Devol but Engelberger formed Unimation which was the first market robots. So now Engelberger has been called the “father of robotics”. For a while the economic viability of these robots proved disastrous and thing slowed down for robotics. But the industry recovered and by the mid-80’s. George Devol Jr, in 1954 developed the multijointed artificial arm which lead to the modern robots. But mechanical engineer Victor Scheinman, developed the truly flexible arm know as the Programmable Universal Manipulation Arm (PUMA). Mobile Robots moved forward in 1983 when Odetics introduced a six-legged vehicle which was capable of climbing over objects. This robot could lift over 5.6 times its own weight parked and 2.3 times it weight moving. After this robots have improved to the point of making a human like figure. Robots have come quite a way since when they began.__   __our robot simulation__ <span style="font-family: Arial,Helvetica,sans-serif; font-size: 80%;">this is the diver's ed challenge. the goal of the challenge is to get the robot to go along the tape. go back to the star, do dognuts, and show a smiley face.

<span style="font-family: Arial,Helvetica,sans-serif; font-size: 80%;">media type="custom" key="6065969" [[image:OPF_Robot_Program_Code.jpg width="720" height="64" caption="FIgure:9"]]
<span style="font-family: Arial,Helvetica,sans-serif; font-size: 80%;"> block1: this block makes the robot move forward.(4 rotations at a power of 69%)(port CB-wheels) block2:this block causes the robot to turn right.(185 degrees at a power of 75%)(port CB-wheels) block3:this block ha the robot move forward again.(2 rotations at a power of 69%)(port CB-wheels) block4:this block makes the robot turn left.(185 degrees at a power of 75%)(port CB-wheels) block5:this particular block make the robot move forward.(1 rotation at a power of 75%)(port CB-wheels) block6: this one backwards.(1 rotation at a power of 75%)(port CB-wheels) block7: this one left.(10 rotations at a power of 50%)(port CB-wheels) block8: this block tells the robot to make the smiley face of its screen. block9: this block says how long the robot should make the smiley face.(5 seconds) All of the block shown in figure 9 together produce the driving course above.

LOG PROMPT 8 the 8 main things something must posses to be living are; to be Made of cells, Need materials, Homeostatic, Respond to stimuli, Reproduce, Grow, Adapted, Respiration. To be made of cells means that something is made up of bunches of cells. Cells are living thing that have many parts. To need material means to need water, minerals, etc. To be Homeostatic is to be in the same state. Responding to stimuli means going towards something good or running from something bad. To reproduce means to continue the species whether it is sexually or asexually. Growing is to go through stages of life, Adapting is evolving, and Respiration is to produce energy from food.