วันพุธที่ 22 กุมภาพันธ์ พ.ศ. 2560

Ball Bearing lab

The Effect of Gravity on Speed

Introduction
Gravity provides a constant acceleration (force) on an object. The effect is changed by using ramps at different angles. In this lab, you will find the optimal angle to maximize acceleration on a ball bearing so it travels the farthest and/or the fastest. Friction is the opposing force created by the surface interactions. Whenever something rolls due to a force, friction will oppose this force and slow it down.

Equipment needed:
Timer Ramp Ball Bearing
Graph Paper (2) Ruler

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


20


20


40


40


40


60


60


60


80


80


80



Observations:

The ball released from higher ramp travel faster and further. The ball release at height 80 cm went faster than and further than 20 cm.




1. Describe how the ball rolls off the ramp at each height—discuss the effect of bouncing or other               factors ?

Answer : The ball roll off at higher position went faster and longer distance than lower height. The result of the height of the ramp cause more acceleration of the ball



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

Answer : The ball with fastest speed was the one at highest angle. To improve speed, we need to change the angle higher.




3. Does the ball travel in a straight line, why or why not ?

Answer : Yes, because of the surface was smooth and does not cause friction between ball and ramp

วันพุธที่ 1 กุมภาพันธ์ พ.ศ. 2560


















cumulus clouds are white and fluffy clouds that usually mean Good weather  

stratus clouds are sheets of low, grey clouds that bring light snow or rain
















cirrus clouds are thin featherlike clouds make of ice crystals high in the atmosphere usually means a change in the weather is coming 



                                                                                  Essay

M1 is this year is very fan and mai koi tem(all students) and most of M.1 is very talkative. when I'm M.2
i will practice more english because i frequent go aboard to travel.and practice english 

วันพฤหัสบดีที่ 3 พฤศจิกายน พ.ศ. 2559

Global warming

cause people make Atmosphere thick by cut the tree.effect the earth has more atmosphere that make heat  move around the world.  and its enough to make. 1.plants die because ex. forest firer 2. herbivore don't have food(plants) its will die 3. carnivore don't have food(meat) its will die same 4.the last human don't have food(plants or meat) human will all die. cure if you cut tree you must plant tree for the new one.don't use natural environment useless .

วันพฤหัสบดีที่ 1 กันยายน พ.ศ. 2559

food chain in panyarat high school

today we going to saw everything in the school and learn about food chain. first snail eat grass and second jayjay eat snail. in the food chain we know jayjay and snail is consumer, glass and leaves is producer 



out food chain

วันพฤหัสบดีที่ 25 สิงหาคม พ.ศ. 2559

                                             science project

my group has Ya-faek ,brighter and Puifai. My poster explains about symbiosis and the example 
-parasitism is the living thing but it thief food from the other living thing example particles that benefit the 
-Mutualism is the coexistence of two kinds of being were mutual benefits example insect and  flower
-Commensalism is refers to the coexistence of two kinds of creatures by one party benefits example whale and plankton
parasites. all of we work is so great
 

วันพุธที่ 27 กรกฎาคม พ.ศ. 2559

วันพฤหัสบดีที่ 21 กรกฎาคม พ.ศ. 2559

a

All the predator has weapon to kill prey

Snake has more species since past to present\
Snake molt Now the serpent was more uncomfortable it must be pointed out every year. If it does not succeed, it was pointed out molt or die while moulting, it can be very painful. Pain stains the surface of enveloped it. When the snake molting It's not quite there Need to rest for a while No strength to fight against the enemy creeping up slowly so during the molt is complete, it will find a new refuge temporarily. However, when it pointed to Its body will grow. It will not feel uncomfortable even more agile and active. Ready to come out to hunt.