The Welsh copper industries of mining, smelting and refining created generations of talented workers. Although dominated by men, women took part too, particularly in the North Wales mines.
Asphalt (Composition) Shingles: The ideal temperature range to install asphalt shingles is between 70 and 80 degrees Fahrenheit. Colder than 70 degrees and the adhesive will not reach the ideal elasticity and will not create a perfect seal.sphalt (Composition) Shingles: The ideal temperature range to install asphalt shingles is between 70 and 80 degrees Fahrenheit. Colder than 70 degrees and the adhesive will not reach the ideal elasticity and will not create a perfect seal.
What is the freezing temperature of petrol? A common mixture in a car radiator is 50 percent ethylene glycol and 50 percent water. This mixture has a boiling point of 223 degrees Fahrenheit. A mixture of 70 percent ethylene glycol and 30 percent water has a boiling point of 235 degrees Fahrenheit. Coolant should be about 200 degrees Fahrenheit for engines to run optimally. A less-common type of antifreeze contains propylene glycol instead of ethylene glycol.