How did Bubble Wrap start? Bubble Wrap began as a type of wallpaper. We see Bubble Wrap fairly often, probably more so since Amazon has taken over our shopping. Bubble Wrap is actually a trademarked brand, and it is owned by Sealed Air Corporation, although it has become somewhat like Kleenex, Aspirin, and Kerosene, in […]
#1492 How did Bubble Wrap start? Read More »
How did they find the Chicxulub crater? They found the Chicxulub crater, the remains of the asteroid that wiped out the dinosaurs, when they were looking for oil. The Chicxulub crater was made when an asteroid ten kilometers in diameter hit Earth. It landed just over 66 million years ago and left a crater that
#1491 How did they find the Chicxulub crater? Read More »
How does a TCAS system work? A TCAS system works by analyzing another aircraft’s position, altitude, and speed and working out if a collision is likely, before offering advice to both planes. TCAS stands for Traffic Collision Avoidance System, and it has been installed on most commercial aircraft since the 1980s. A need for such
#1490 How does a TCAS system work? Read More »
Why did the Titanic sink? The Titanic sank because of poor quality materials, problems with the design, the temperature of the water, and a lack of equipment for the crew. I’m sure you are all familiar with what happened to the Titanic. The Titanic was built in Britain, and she was an ocean liner owned
#1489 Why did the Titanic sink? Read More »
When did a week get 7 days? People first used a 7-day week over 4,000 years ago in the Akkadian Empire. When we think about it, there is no logical reason why a week should have seven days. You cannot divide the year up into 7s. For a while, the French tried a ten day
#1488 When did a week get 7 days? Read More »
How does a thermometer work? A traditional thermometer works by knowing how much mercury will expand at different temperatures. An oven thermometer works by knowing how much a piece of metal will expand when heated. And a modern thermometer uses a thermistor, which has a different electrical resistance at different temperatures. The idea behind the
#1487 How does a thermometer work? Read More »
What causes condensation? Condensation is caused by warm, moist air coming into contact with a cooler surface. Condensation happens in a house when the air in a room is warm and moist and then comes into contact with a cool surface. This often happens in winter when it is much colder outside and the heater
#1486 What causes condensation? Read More »
How do CDs and cassettes record information? CDs record information by using pits and bumps, or by using burned colored dye. Cassettes record information by using charged magnetic tape. There are three types of CDs. There are the CDs you buy prerecorded from the shop, CDs that you burn yourself in your computer, and CDs
#1485 How do CDs and cassettes record information? Read More »
What are blisters and calluses? A blister is a pocket of body fluid that has formed between the outer layers of skin in response to damage. A callus is an area of thickened skin that has been formed to protect the skin from damage. The word “blister” came into English from the old French “blestre”,
#1484 What are blisters and calluses? Read More »
How does a gravitational slingshot work? A gravitational slingshot works by using the gravity of a planet to get an increase in speed without expending extra energy, and to change direction without losing speed. A gravitational slingshot is technically called a gravity assist because the gravity of the large body is assisting the spaceship. As
#1483 How does a gravitational slingshot work? Read More »
