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Question:

What is the difference between sunscreen and zinc?

What is the difference between sunscreen and zinc?

Answer:

its cat's eye's, not dog's. when the light reflects on to a cat it glows, Cats' eyes One night, a road-mender from Yorkshire was driving home and swerved to avoid a cat – which he noticed because its eyes had reflected his headlamps. If Percy Shaw hadn't seen that cat's eyes, he would have driven straight over a precipice. He went on to develop one of the simplest, but most effective, road safety devices: a road stud with 'retroreflectors' that send a beam of light back on a parallel path to the ray that enters, just as the retina of a real cat's eye works. Shaw's glass studs were maintenance-free and even incorporated a self-cleaning method using rainwater, inspired by tear glands and eyelids. He patented the design in 1933, the first 50 were fitted to a road in Bradford and he went on to become a millionaire and OBE. Most cats' eyes on British roads today are white and are positioned down the centre of a road; red cats' eyes mark out a motorway hard shoulder; amber denotes the central reservation; green are for a junction; and mark out blue for designated police sliproads. Modern solar-powered LED road studs are now making their debut, but are more expensive to make and may not last so long.
-if you have long hair make sure you tie it back. -roll up long sleeves -don't ever eat or drink during labs -follow directions correctly thatss all ive got! hope it helps

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