Misc: in egyptian mythology, who was the cow-headed goddess of love?

Questions

What is added to rubber when it is vulcanised?

What was invented by John Walker of Stockton on Tees in 1827 and called Congreaves?

Which english entrepreneur produced the first synthetic dye?

What did William Hunt invent in 1849 to hold things together?

What is the trade name for the strong woven synthetic material used for hulls and sails, radial tyres and bullet proof vests?