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awe

User Name	Thread Name	Subject	Posted
Nigel Parsons	BS: Language Pet Peeves (1645* d)	RE: BS: Language Pet Peeves	01 Nov 20
Subject: RE: BS: Language Pet Peeves From: Mrrzy . . . Newly discovered Triassic lizard could float underwater to pick off prey ... Well, if it is floating, it is not underwater, now, is it? Well, actually, they can be 'floating'. It just means that they do not need to regulate the depth of their dive. Floating is being in a state of suspension due to the upthrust of the medium one is in matching the downthrust of ones weight/mass. Or, as our physics teacher had us memorise: "When a body is wholly or partially immersed in a liquid or fluid it receives an upthrust equal in force to the mass of liquid or fluid displaced." Hope I got that right, it's 50 years ago now, and a quote (in translation) of Archimedes. Divers use weighted belts to offset the floatation effect of the sea-water surrounding them.

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