Let us discuss Physics questions - Page 4

Physics question in Computer section ... 😕 i guess we already have college and university section ...

It's Computer, Science and Technology section.

Should I ask next question? Koi interested lagta hi nahi hai ees thread mein. 😭

Please ask...I'm sorry but I haven't been coming online much..have to attend classes all day.

Next question please 😊

A helium-filled balloon moves up. This means that there is some force in the upward direction on the balloon. But what is that force and what applies that force? Gravity always pulls the balloon down. Then, how does the balloon move up?

ans- force of buoyancy. due to the pressure dif a net upward force act called the force of buoyancy

Thanks, Rajnish. The answer is correct. It is because of buoyancy.
Another question: -

On higher altitude, why is temperature lower?

Originally posted by: akhl

Thanks, Rajnish. The answer is correct. It is because of buoyancy.
Another question: -

On higher altitude, why is temperature lower?

As pressure at higher altitude is less and thus Because of the lower pressure, the air expands as it rises, which causes it to cool. Thus, high altitude air is cold, which causes temp to drop. 😊 an i right?😃

My question- why fan moves only in one direction?