Qualification > Sciences
ALL PHYSICS DOUBTS - POST HERE !!
saleemsamer:
;D :DTHX GUYS
CatAly$t:
can someone tell me what is an optic pin??
Cool guy:
hey guys can u explain me carbon dating????
astarmathsandphysics:
carbon dating.
radioactive carbon 14 is constant ly produced in the atmosphere by caosmic rays.Plants use it to grown and animals eat the plants. a steady concentration is maintained. When the living thing dies they stop earing the plants and the carbon 14 concentration starts to fall since the carbon decays at a constant rate and is not repkaced.By measuring the concentration of carbon 14 we can say how long since the animal died.
Malak:
2002 Nov Paper 3 Question 8:
Fig. 8.1 shows a long straight wire between the poles of a permanent magnet.
It is connected through a switch to a battery so that, when the switch is closed, there is a
steady current in the wire.
(wire in a direction at right angles to the page)
How can we find the direction of the movement of wire..I know by using fleming's L.H.R but there is no direction for current given?Or maybe i didnt understood the question :S
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