The volume of earth is more than ten times the volume of mercury.

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Agalvanometer has an internal resistance of 100 ω and deflects full-scale at 2.00 ma. what size resistor should be added to the galvanometer to convert it to a milliammeter capable of reading up to 4.00 ma, and how should this resistor be connected to the galvanometer?

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

What is the increase in density of a medium due to wave travel?