Recent content by ZiHao

Thanks for your information. Another idea pops in my mind, a wireless mouse with peltier tiles and piezoelectric crystals when you click on it. Is it possible? Haha.. going to do more research

Or is there any energy harvesting components to work on this? Piezoelectric crystals?

Hi all, I am planning to install two Peltier tiles( TEC-12706 ) to an electric toothbrush which runs solely on the heat of human hand. I have tested the tile and it can generate about 150 millivolts, which is not sufficient to power a 12V DC electric motor. I think I should get a transformer or...

The thing I knew about Peltier Tiles is that when there is a temperature difference, it generates electricity, and the bigger the tempreature difference, the greater the power you will get. But why it works? Basically, I have partnered with three other friends to participate in a science contest...

A balloon is filled with a gas to a certain volume at a certain pressure at 22.0 degrees Celsius. If the pressure exerted on the balloon is doubled. explain what must the temperature ( in degrees Celcius) be so that the volume of the balloon doesn't change. If the temperature changes, the...

Oh, sorry. I think that is for UK. I am in Malaysia and going to take IGCSE exam in 2020.

I am a year 9 student now and I really want to understand physics very well, what can I do? I don't want to spend time playing and walking around with my friends at school. Being the top student in my advanced science class is my target. Thanks!

Is Additional Maths important for astronomy?

The purpose of heating the water in the can is we need to fill the can with steam and displace the air, because the steam has higher temperature than air therefore more particle collision and higher pressure in the can. So when we cool the can , steam condenses to water, it takes up much less...

A teacher heats some water in a drinks can until it is boiling and steam comes out of the can. She quickly turns the can over and puts it into some water. Explain in detail why the can collapses. My solution will be: By boiling the water, the water changes state from liquid to gas, which is...