วันพุธที่ 21 กุมภาพันธ์ พ.ศ. 2561



Determining Buoyant Force Lab


Table
1. What force is responsible for the difference between the weight of each object in the air and its apparent weight in water?
Ans: Buoyant Force

2. How is the buoyant force related to the weight of water displaced?
Ans: The force is upward so it negates the gravity force pulling downwards.
        The more buoyant, the less water is displaced.

3. Define buoyant force and describe 2 ways you can measure it or calculate it.
Ans: The upward force acted upon a submerged object.
        Using spring scales and using Archimedes's principle. 

4. Explain what causes an object to sink or to float, using the terms buyancy, weight, force, density, and gravity.
Ans: An object floats because there's a lot of buyancy supporting it. Buoyant force lessens the weight of the object so it negates the gravity and make it floats. But the object with more density wouldn't.



วันพุธที่ 14 กุมภาพันธ์ พ.ศ. 2561

I had a lab which we tried to bend water.

Equipment:
1. Water
2. Beaker
3. Funnel
4. Balloon filled with air
5. Hair / Sweater

I knew a balloon with no electrostatics, and poured water beside the balloon, it doesn't attract water to the balloon. Secondly, we rubbed the balloon with our hair and tried to pour water beside it again, the water bends! 

The Water Bends!


This things is amazing

Sino's hair test the electrostatics



วันพุธที่ 15 พฤศจิกายน พ.ศ. 2560

วันพฤหัสบดีที่ 14 กันยายน พ.ศ. 2560

Questions

1)  Why do we add salt to the ice?
It makes ice close and sticks together and hard to melt.

2)  Why do we add the cookies and other things, only after the milk has frozen slightly?
The cookies won't move and it wasn't easy to make it hard.

3)  What are two factors that affect the freezing you think?
Ice and Salt. I think also the shaking stuff

4)  Why do you need a bit of air in the bag?
Because the milk can move around easy.