 Now we are seeing the Bernoulli's equation, one more application is the spray gun. Have you seen that spray gun through which you spray some? No, no, no. What is our air forward? Then the velocity, and here is liquid inside that, so when you press, so the air rushes outside, fluid also along with it. So that is what, and pour it over only one cockroach, right? You want to spread it across, right? So that is, which explains the Bernoulli, what is actually, what it is actually? Block it, even heart needs oxygen, and how the heart issues starts to die. The same thing happens inside the heart, okay? This is very serious, because if it is heart attack, how it starts, initially you... Is it uniform? Yes, it is, it used to be uniform. You might be acting on the ball in this way, in this direction, alright? So this is called dynamic lift, and another way to move forward, it didn't happen with the air graph. If the air graph, so let us study that, what actually happened, okay? Ball swinging, alright? Whatever happens above, no change.