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Q. The typical trend in a rising plume of subduction-zone magma is to increase: a) the percentage of SiO2 b)the viscosity c) the explosive potential of the magma by holding in the gases more tightly d) all

Q. An experiment is designed which consists of a tube mounted to the top of a 6 foot high desk. Ball #1 is shot through the tube and is shot horizontally off the edge of the desk. At the exact same time ball #1 clears the edge of the desk, ball #2 falls of the edge of the desk straight down. ball #1 velocity- 30ft/sec. Which ball will hit the ground first? How long odes it take each ball to hit the floor?

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