วันอังคารที่ 24 มกราคม พ.ศ. 2560

Cloud

Cumulus










Cumulus - White and fluffy


Stratus









Stratus - Flat and thin




Cirrus

Cirrus - Streak and looks like a feather.


Essay
This is my first year in Panyarat High School. I've learned a lot of things that are new and things that I never try before. Learning here is very fun because I have a lot of new friends. My favorite subjects are P.E. and science. I like P.E. because I like to play sports and I like science because I can do a lot of experiment. I like fish lab the most. I have an opportunity to join spelling bee contest, speech contest, and engineering challenge during academic week. I got the first place in spelling bee contest. This year I practice in World Scholar. I know a lot of new knowledge about science, history, and art. World Scholar makes me better at speaking English. Next year I hope I would be better at speaking English and better at debating.





วันจันทร์ที่ 9 มกราคม พ.ศ. 2560

ball bearing lab


Procedure:
1.         Put the ramp against the seat of a chair.  Place the ramp and chair so that the ramp points towards the hallway.  Have your teammate on the other end of the hallway. 
2.         Place the ball bearing at the top of the ramp.
3.         Lift the ramp 20 cm and release the ball bearing
4.         Time how long it takes to travel  5 meters.
5.         See how far it will go..
6.         Repeat the experiment three times for each height then do 40 cm, 60 cm, and 80 cm.

Height
Time to travel 5 meters
Distance travelled
20
 3.4
 4.8
20
 4
 4.8
20
 3
 4.8
40
 7.5
 4.8
40
 9
 4.8
40
 8.88
 2.65
vertical
 7.47
 0.5
vertical
 11.56
 1
vertical
 10.65
 0.8



Observations:
20 cm the ball go fastest and furthest
40 cm the ball go fast and far but not as 20 cm
vertical the ball go slowest and only 0.8 meter distance.


Analysis
1.         Describe how the ball rolls off the ramp at each height—discuss the effect of bouncing or other factors.
           
 Ans. 20 cm. - The ball go in straight line.
         40 cm. - The ball is tilted.
         vertical - The ball bounce.

bouncing and tilt make the ball go slower.


2.         Discuss what is the fastest speed reached and any factors that could improve this.

 1.6 m/sec , make floor slope.




3.         Does the ball travel in a straight line, why or why not?
No, because force in each side aren't equal.