An object is thrown off a cliff 200 meters high, with an initial velocity 20 meters per second, at an angle of 30° above the horizontal. how long is the ball in the air

aug 15, 2012 - although van leeuwenhoek was not the inventor of the microscope, he advanced it more he loved to grind and focus a new lens in order to see the unseen world. most of leeuwenhoek's microscopes were silver. in a simple but significant experiment (1668), he demonstrated that worms found on

because dead babies can't fart