If he drops it yes
Yes, if the fielder had full possession of the ball when he touched the base the runner is out.
It depends on the location of the ball, not the location of the fielder or of his feet.
No, the glove is considered an extension of the fielder's hand so if the glove comes off the fielder is deemed to have dropped the ball.
It depends on what is in the eye drops.
if a penguin drops its egg it will die
What happens to a plane's air speed when the nose drops slightly, is that the plane accelerates.