Technology

How much energy is generated from recycling a glass jar?

Recycling one glass jar saves enough energy to operate a television for three hours.

What was the first metal used by man?

Over 4,000 years ago, when it was discovered that minerals could be melted, curiosity led man to combine melted metals (alloys). By accident they made bronze by adding tin to copper (the Bronze Age). Another combination of zinc and copper made brass.

Who is the father of mechanics?

Much of modern engineering mechanics is based on Isaac Newton’s laws of motion while the modern practice of their application can be traced back to Stephen Timoshenko, who is said to be the father of modern engineering mechanics.

How big is a communication satellite?

Modern communications satellites can weigh up to six tons and be the size of a small school bus. In order to give some idea of the size of modern communications satellites, here are some pictures of communications satellites as they are being built.

When did we get electricity?

In 1882 Edison helped form the Edison Electric Illuminating Company of New York, which brought electric light to parts of Manhattan. But progress was slow. Most Americans still lit their homes with gas light and candles for another fifty years. Only in 1925 did half of all homes in the U.S. have electric power.

What were Kleenex tissues originally meant for?

When there was a cotton shortage during World War I, Kimberly-Clark developed a thin, flat cotton substitute that the army tried to use as a filter in gas masks. The war ended before scientists perfected the material for gas masks, so the company redeveloped it to be smoother and softer, then marketed Kleenex as facial tissue instead.

Why do we have water towers?

Water towers are able to supply water even during power outages, because they rely on hydrostatic pressure produced by elevation of water to push the water into domestic and industrial water distribution systems; however, they cannot supply the water for a long time without power, because a pump is typically required