Coal contains energy. a. light b. kinetic c. chemical d. mechanical

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?

Ineed the answer to question 1 , i’m desperate

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?