are spinning columns of air that cause random patterns of dark streaks on Mars’ surface. Hurricanes
Blizzards
Dust devils
Tornadoes
(Apologies for picking the wrong subject, there was no Astronomy category)

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?

What is special about a dc circuit ?

What are the necessary conditions for fusion?