Se cada lado de um quadrado é igual a 90º. Então 4×90º=360º.! E um círculo equivale a 360º! É correcto afirmar que um quadrado é igual ao círculo?

In positive numbers less than 1, the zeros between the decimal point and non zero are significant

Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec