Results for: Leading

In Health

Can you get lead poisoning from the lead in a pencil?

No. Pencils have never been made with lead. The "Lead" is actually  graphite blended with either clay or a plastic resin (to add  strength and control the writing "hardness" (MORE)
In Science

Is there lead in a lead pencil?

Lead has never been used in lead pencils. The lead in a lead pencil is made of graphite, a form of carbon, together with clay and other additives that hold it together. Ow (MORE)

Why is pencil lead known as lead if it is not really lead?

In ancient Rome, scribes wrote on papyrus (an early form of paper) with a thin metal rod called a stylus. The rod left a light but readable mark. Some early styluses were made (MORE)
In Science

What is the percentage of lead in lead pencil?

The percentage is 0%. "Lead" in this case is a misnomer. Pencil "Lead" is made of graphite (an allotrope of carbon) and different levels of clay to control hardness.
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Book Spotlight - In Memory: A Tribute to Sir Terry Pratchett

In March 2015 we lost one of the world's greatest literary minds - Sir Terry Pratchett. Terry was suffering from Alzheimer's and fiercely campaigned to raise awareness of the (MORE)
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What can lead do?

In 1890, the first case of lead poisoning was discovered in Australia. However the source of the lead was not traced to the paint on the verandahs and railings until 1904. In (MORE)

Which ECG leads are bipolar leads?

The leads in Einthoven's Triangle, which are Leads I (left and  right arm), II (right arm and left foot)), and III (left arm and  foot).
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In Grammar

Is lead past tense for lead?

The past tense for lead (as in to lead an animal) is led. You would say 'the cowboy led the horse to the river'
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Is pencil lead real lead?

No, there has never been any real lead in pencil lead. It is a mixture of graphite (carbon) and clay.
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How do you get lead?

The metal lead is produced from the lead ore Galena (lead sulphide, PbS) by mixing it with coke and limestone and then roasting. To obtain the pure metal, it needs to treate (MORE)