(fluid mechanics)
the only thing i'm confused about is what formula i should use:

gasoline is siphoned from a large tank open to the atmosphere. the height difference from the top of the gasoline in the tank to the open end of the siphon is 1.0 m. what is the velocity of the gasoline as it comes out of the siphon?

Galileo was the first to notice that the moon has craters, valleys, and mountains. how might this have changed people's perception of the moon at the time?

An electric current in a wire will push or pull on a permanent magnet. which statement best explains how an electric current creates an electromagnetic force on another magnet?

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.