I think it would be very hard to go back to not having the convenience of a mobile phone, but not hard enough to think that I couldn't live without it. I believe many people have allowed mobile phones to take up too big a part of their lives. The use of the mobile phone … Read more

A bi-metallic strip is a thin strip of two metals bonded together back-to-back (usually rectangular in shape) that has one metal coating one side and another metal coating the other side. As the temperature changes, the expansion of the two metals being different causes the metal strip to bend toward the side of the metal … Read more