If star a has an apparent magnitude of -6 and star b has an apparent magnitude of 5, which star is brighter in our sky?

Ascientist observes hot water erupting from a vent in the earth. what most likely caused the water to rise and erupt from the vent? the vent was lower than the water table. a well was drilled into a pressurized aquifer. a well with a mechanical pump was installed. the water was heated by magma or hot rocks.

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What information is usually stamped on the side of a rifle's barrel?