P143

1. i was the logistic again and i was in charge of the mertiral and in the testing part i was choosen to be the pilot and i fire the Catapult.
2 i think we have done the EDP very succesfully becuase we  distribute different job for each of us in the frist place ,maybe we don't have a lot of time to test our production but i think we have done a good job.
3.we made our design after we found it not standing.
4i like the idea that cut the leg of the catapult becuase it's my idea. i don't like the deisgn of the laucher , it should be smaller.
5 gravitational potential energy change to motion energy , and we use force to gain motion energy.

1. At frist I was a logistic ,I was in charge of Collecting and returning equipment keeps track of time , and later I took part in enginering ,building the tower.
2 they should consider about its hardness
3 Gravity
4 triangle becuase it was the most stable feature in the world
5 we try to make it stronger and harder
6 if we don't test our tower ,our tower will fall in the frist place
7 we spend a lot of time cutting the noodle but the others didn't , next time we can try it. 

1 The calorimeter need to keep the heat . the external surface will make sure heat stay in the device 
2  the coil surface have insulating effect. So it keeps heat inside it
3  the water need to be heat up in a short time. And aluminum can conduct heat better
4  copper. Because the thermal conductivity is higher then aluminum. 
5  Yes, if we measure that every time the temperature went up one celsius degree, the measure of heat will be 4200 joule.

http://dl.acm.org/citation.cfm?id=502257


This is the link of my scenic but if you want to see the pdf file，you will need to buy it。。。


The main theme in the article is that the Arthur consider handheld computing devices which are connected to a server (or a powerful desktop machine) via a wireless LAN。


  I think it's very professional because it  have a clear topic and the during the report it has many  thesis and after the experiment some are right and some are  not right mainly they use data to show if its right or wrong ，the way they are doing the report is also very professional and they used many high level vocab lorry and they always stick on their point and a easily langue to keep people from misunderstanding.，And Arthur it self is very professional ，and they are from university and they have their article published some where else。they never went off topic。And in the end of the experiment they have a comment box where people can ask question and point out mistakes.


 Although i can not perfectly understand this experiment ,i know this is a good senitic article because 

I used to think people are black is from india But now I know HASIL is not a Indian
I used to think china is not good enough for study But now I know  foringer comes to china to study。
I used to think milk can save heat for coffee But now I know it doesn't have。
I used to thinkweebly can't post ppt on it But now I know yes it can。

SP 1: Representations & Models
representations or models to represent scientific phenomena 
SP 2: Calculations
Use Mathematic and Calculations appropriately.
SP 3: Questioning
Engage in scientific questioning to guide inquiry based investigations.
SP 4: Collect Data
Plan and implement data collection strategies in relation to specific scientific questions.
SP 5: Analyze
Analyze and interpret evidence gathered from an investigation.
SP 6: Justify
Justify and explain data results and analysis through debate and argumentation.
SP 7: Identify Errors
Be able to identify and construct explanations of data collected and identify errors made & possible improvements in investigations.
SP 8: Connect
Connect concepts learned and discussed in class to society, technology and the environment.

Homework Inquiry Question: “Is the Earth a perfect sphere? Justify your answer.”  
 no ，It’s not a perfect sphere. After using the Google earth program I found out that the length of the longitude and the latitude are totally different. The latitude is a little bit longer than the longitude. So it can’t be a perfect sphere.

Calculation 1: Compare your calculated values with the actual values and calculate the percentage error using the formula below. List possible reasons for this error.
Longitude: Percent Error=(|39147.2-40208.08|/40218.08) x100=about 0.37%
Latitude: Percent Error=(|31583.4-40175.7|/40175.7) x100=about 23.8%
Possible reasons: distance on map may be different with the actual data or the distance I measured may not be exactly where the point is. 
Calculation 2: calculate the rate of travel (km per day) necessary to navigate the circumference of the Earth in 80 days.
Longitude: 40008.08/80=500.101 km/day
Latitude: 40075.7/80=500.94625 km/day 


Assuming that there is a way to navigate the circumference of the globe in an automobile, how many days of continuous driving would it take, at a rate of 100 km/h to circumnavigate the circumference of the Earth? Is it quicker to take the equatorial or Polar route?
Equatorial: 40075.7/100=400.757=about 401 days
Polar: 40008.08/100=400.0808=about 400 days