Lowers Recommended Lead-Level Limits in Children. For the first time in 20 years, federal health authorities have lowered the recommended limit for lead exposure in young children, which they say could add 200,000 children to those believed to have unsafe lead levels in their blood.
Electrical Units of Measure. The standard SI units used for the measurement of voltage, current and resistance are the Volt [ V ], Ampere [ A ] and Ohm [ Ï ] respectively.
The unit of measurement for resistance is ohms and its symbol is the Greek letter omega (Ï). The resistance of one ohm means a conductor allows a current of one amp to flow with a voltage of one volt. All materials are difference in allowing electrons flow.