Человек действует на лопату с силой 200 Н, найдите давление лопаты на почву, если площадь острой кромки лопаты равна 2см в квадрате. ​

if i'm asked whose profession is the hardest-teacher.It's not easy to count how much fishes are in ocean,how much stars in the sky, and by which law fishes and stars live ,but there are no hard laws , human grows by. If i'm asked whose profession is the most important,i'll answer-teacher's.Just imagine for a second that she disapears and no one of us is not a worker , nor engineer anymore, not even a poet will become ,who he became.I asked an artist to paint  the teacher ,one artist painted a man with a pointer at the blackboard,the other - the woman near the globe. I can't see ,that it's a teacher - I said.This may be a teacher of geography or math,but for me the real teacher-is the one that makes you more kind and smart.

And then the third painter drew a big and a small man ,going to meet the sun and holding hands.

 He's right,i thought.He seems to be like a real teacher, may be they are two of them.Because in a great hour of apprenticeship ,we are always alone with our teacher.

what are these two talking about:stars,rain,sun?

I don't know, i'm just sure that they are happy together,they are interested and nothing scaries them .

If i'm asked ,who's the happiest person on Earth,i'll answer-a good teacher