Which instrument provides the only means of making nearly continuous measurements of surface conditions over the ocean?

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it