⁣Expansion of liquid and gas

Skeletal system - https://www.prathamopenschool.....org/catalog/contents
Part 1 - https://youtu.be/mFPam6Hi8OQ
Part 2 - https://youtu.be/ZlHSY0ktEQo
The content is conceptualized and developed by the Science Activity Centre, IISER Pune. It is created for and supported by Pratham Education Foundation. This is a series of 16 videos that will be premiered on Wednesdays at 7 PM on our YouTube channel.

For practice questions after each video, register an account to access our free senior science courses at https://courses.meristem.anu.edu.au. Teachers can access free lesson plans and in-class activities by joining our teacher community via http://meristem.anu.edu.au/ind....ex.php/new-to-merist

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

Part 1 - https://youtu.be/mFPam6Hi8OQ
Part 2 - https://youtu.be/ZlHSY0ktEQo
Part 3 - https://youtu.be/EkVbm2nv-1Y
The content is conceptualized and developed by the Science Activity Centre, IISER Pune. It is created for and supported by Pratham Education Foundation. This is a series of 16 videos that will be premiered on Wednesdays at 7 PM on our YouTube channel.

For practice questions after each video, register an account to access our free senior science courses at https://courses.meristem.anu.edu.au. Teachers can access free lesson plans and in-class activities by joining our teacher community via http://meristem.anu.edu.au/ind....ex.php/new-to-merist

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

In this video, you will make a wonderful water fountain with very simple materials.

For this, you will need a balloon, a plastic bottle, a bendable straw, glue, and a pair of scissors.

Make a hole near the mouth of the plastic bottle with scissors. Insert a straw in the bottle and secure the hole with the help of glue. Fill the bottle with water. Now blow a balloon and hold its neck with fingertips. Carefully fix the balloon on the mouth of the bottle. When you release the air from the balloon, it creates pressure in the bottle and thus pushes water out creating a wonderful fountain!

So, let’s look at what actually happens in this experiment? The air inside the balloon is under higher pressure. When you place the inflated balloon on the mouth of the bottle, the air pressure on top of the bottle increases. This pushes down on the water in the bottle which rises through the straw and comes out making our little fountain

Instead of a single straw, you can also fix five straws in the bottle. When you fill the water in the bottle and fixed an inflated balloon, you will see an elegant fountain with five streams.

Make your own pressure fountain and have Fun!

We hope you enjoyed this experiment and learned something new. For more such hands-on science and mathematics activities visit our YouTube channel. IISER Pune science activity Centre.

Team: Ashok Rupner, Chaitanya Mungi, Shraddha Bhurkunde, Neha Apte, Sandeep Jadhav

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

Smaller Balloon stronger Balloon – Air Pressure
This is a wonderful and counterintuitive experiment WHICH can BE DONE WITH ordinary materials which are readily available in your house. you need a rubber tube, few balloons, a thread, clamps, and a pair of scissors.
Seal one end of the rubber tube with clamp, Inflate a balloon and fix it to one end of the rubber tube with the help of a thread. Inflate another balloon to a smaller size and fix it to the other end of the tube. Make sure that there is no air leakage from the balloons.
Now that the setup is ready, guess what will happen when we open the clamp?

Most people think the air will flow from the big balloon towards the small one and eventually, both the balloons will be of the same size.

Surprisingly, it’s the opposite scenario, the air flows from the small balloon towards the bigger balloon expanding it even further
So why does this happen? As you know, air always flows from higher pressure towards lower pressure which means the smaller balloon has higher air pressure inside compared to the big one. This phenomenon can be explained by Laplace equation.
According to the Laplace equation, there exists a pressure difference in curved surfaces. As the radius decreases, the pressure difference increases i.e., the radius of the curvature (r) is inversely proportional to the pressure (P).
P ∝ 1/r
Since the radius of the small balloon is less than the radius of the big one, it has greater curvature and hence more pressure in it.
This explains why air flows from small balloon to big balloon
now let's try this with two small balloons at one end of rubber tube and a bigger balloon at the other end of the rubber tube. For this experiment, a “Y” shaped joint is made on the rubber tube to which the two small balloons are attached. Upon opening the clamp the air flows from smaller balloons towards the bigger balloon.
If you are more ambitious you can try this experiment with two different sized soap bubbles. Make a slant cut at one end of the straw and insert it in the other end. now bend both the ends of straw and make a U shaped assembly. Make a small hole and Insert the used refill at the center of the assembly. Make four petal-like cuts with the scissors on the open ends of the straws. Block one arm of the straw with clamp and dip the other end in soap solution. Blow air to make a small bubble. Now, close the other arm of the straw and blow air to make a bigger soap bubble. When we remove the clamp you observe a similar effect and the Air in the smaller bubble will flow towards the bigger bubble.
I hope you liked this experiment and learned something new today. For more hands-on science experiments and DIY science crafts, you can visit our YouTube channel which is “IISER Pune science activity center” and subscribe to the same. Have a Fun!

Team: Ashok Rupner, Chaitanya Mungi, Shraddha Bhurkunde, Neha Apte, Atul Gavade, Sandeep Jadhav

For practice questions after each video, register an account to access our free senior science courses at https://courses.meristem.anu.edu.au. Teachers can access free lesson plans and in-class activities by joining our teacher community via http://meristem.anu.edu.au/ind....ex.php/new-to-merist

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

For practice questions after each video, register an account to access our free senior science courses at https://courses.meristem.anu.edu.au. Teachers can access free lesson plans and in-class activities by joining our teacher community via http://meristem.anu.edu.au/ind....ex.php/new-to-merist

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

Fidget spinners are toys that have gained popularity these days as they spin for a very long time and stay balanced while spinning.
Today we will make an innovative handy electricity generator by using fidget spinner. In this simple model, we use spinning motion to create a fluctuating magnetic field which in turn generates electricity.
To design the generator, we need
1. Thin insulated copper wire
2. A fidget spinner
3. 3 Neodymium magnets
4. Cylinder caps and bottle cap
5. LED
6. Wooden board
7. Bottle cap
8. Cutters
9. Glue

The key thing about the fidget spinner is the ball bearing at the center of the toy which allows free rotation. The design of this part is very simple.

• Stick a disk neodymium magnet on one side of each arm of the fidget spinner using glue. Please make sure that the magnets are attached at the center of the circle to make it balanced.
• To make the coil, wind insulated copper wire on a cylindrical cap or PVC pipe. Wind the wire proximately 1000 times to make the coil as shown.
• Keep both ends of the wire uncoiled to serve as connection points. Tie this coil at several places to prevent it from unwinding. Wind the wires such that the windings do not open easily.
• Scrape off the insulation at the ends of two leads of the coil. Carefully check if the insulation is removed completely. Now join the LED to the coil. Your coil and LED assembly are now ready.
• Now place the fidget spinner on the bottle cap to get some height and keep the coil LED assembly underneath the magnet. Keep the gap between the magnet and the copper coil minimum.
• When you spin the magnets attached to fidget spinner above the coil then you see the LED glow.
• Once you have got one coil assembly to work, go ahead and mount the assembly on a wooden strip.
• With help of glue stick the cylindrical cap, coil assembly and the LED on the wooden strip.
• Stick the spinner on the cylindrical cap using glue. Let the complete assembly dry.
• Make sure that the magnets attached to the spinner do not touch the coil. When you spin the magnets above the coils then you can see the LED glowing. You can spin the toy in the dark to see this beautiful effect.
• The model works according to Faraday’s law which states that a changing magnetic field through a coil of wire induces an electromotive force (emf) in the coil which in turn causes current to flow. The law describing induced emf is named after the British scientist Michael Faraday.
So friends play with your fidget spinner and make it do more things than just spinning!
We hope you learned some new today from these experiments.
To learn more such Fun hands-on science and math’s activities please visit our YouTube channel “IISER Pune science activity center”.
Have fun!

Ashok Rupner, Chaitanya Mungi, Shraddha Bhurkunde, Neha Apte, Sandeep Jadhav Music: Dr. Manasi Kulkarni

This topic is covered in SSC 10th Std. Science Part 1, Chapter 4: Effects of Electric Current, Page No. 59-60 and NCRT 10th Std. Chapter 10: Magnetic Effects of Electric Current, Page No. 233-236.

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

For practice questions after each video, register an account to access our free senior science courses at https://courses.meristem.anu.edu.au. Teachers can access free lesson plans and in-class activities by joining our teacher community via http://meristem.anu.edu.au/ind....ex.php/new-to-merist

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.