A water heater timer is a small electronic device that fits onto your current hot water heater (either gas or electric), and allows you to set specific “on” or “off” periods for hot water production and maintenance. In standard hot water heaters, energy is required to keep the water in…
There are two main sources of oily film on water: hydrogen sulfide and iron bacteria. Here’s your trick for being able to tell the difference: stir the water with a stick. If you see the oil not breaking up when you stir the water, it’s most likely hydrogen sulfide. The…
The Warren Court was the period from October 5, 1953, to June 23, 1969, during which Earl Warren served as chief justice of the Supreme Court of the United States. Along with the Marshall Court of Chief Justice John Marshall from 1801 to 1835, the Warren Court is remembered as…
Southwest Asia is almost completely surrounded with salt water. If you had a process to turn all that water into fresh water, voila! You have your solution. Here’s the problem with this though: desalination is great, but it is very expensive, especially to get the equipment. Photo/Conor Ashleigh In South…
A ruler can be used as a straightedge, but a straightedge cannot be used as a ruler. A ruler is a type of straightedge which has measurement gradients and is used to measure length. A straightedge is used only to make or draw a straight line but not to measure…
Chinese refer to the Yellow river as “the Mother River” and “the Cradle of Chinese Civilization”. That is because the Yellow River was the birthplace of ancient Chinese civilizations in the Xia (2100–1600 BC) and Shang (1600–1046 BC) eras – the most prosperous region in early Chinese history. In Chinese…
The tradition of a first dance goes back to 17th-century Europe. This was a time in which formal balls were popular, and it was customary for a guest of honor (typically the person of the highest social standing in attendance) to lead the first dance. The Origin of the First…
As the air leaves the equator, it rains away more moisture, becoming denser and slightly cooler, until finally dry, it sinks, creating the arid bands where many of the world’s famous deserts lie. This giant atmospheric conveyor belt, officially called a Hadley cell, brings us both tropical rain forests and…
Answer: You are right in that high tide occurs on the sides of the Earth which face toward and away from the Moon. This is due to the fact that around the Moon is pulling on the Earth, and the ocean, on the sides facing the Moon. The Earth compensates…
“Car horn” redirects here. For the song, see Car Horn (song). A horn is a sound-making device that can be equipped to motor vehicles, buses, bicycles, trains, trams (otherwise known as streetcars in North America), and other types of vehicles. When the driver activates the horn, the relay provides power…