Recent content by timothychoi

Oh. I noticed that an airplane floats by "lift". Thanks.

I see. It is like an airplane.

When I blow a balloon with CO2, it falls as it is heavier than air. Then it is gravity that causes the balloon to fall. When I buy a balloon filled with helium gas from a store, it floats as it is lighter than air. But what force is causing the balloon to float?

If Jupiter is made of gas, how can it maintain its spherical shape without being contained in a spherical shaped container?

Hello. In the Wiki entry for "Leibniz harmonic triangle" there one can find a formula L(r, c) = 1/(c * binom(r - 1, c - 1)) where L(r, c) is the entry in the harmonic triangle and the binom() is the usual binomial notation (or the entry from Pascal triangle). I tried to prove the...