Uzi maalum wa kupeana Likes: Comment chochote upate "Like"

575. How does a thermometer work?

A thermometer has a glass tube sealed at both ends and is partly filled with a liquid like mercury or alcohol. As the temperature around the thermometer's bulb heats up, the liquid rises in the glass tube. The glass tube is mounted on a backboard that is marked in units called degrees. When it is hot, the liquid inside the thermometer will expand and rise in the tube. The opposite happens when it is cold. The temperature on a thermometer is read by finding the level of the liquid in the tube and the number on the temperature scale across from it. The temperature is written in numbers with the (degree) sign. For example, 70°F is read: 70 degrees Fahrenheit.
 
574. What is a Mirage?

A mirage is a naturally occurring optical phenomenon in which light rays are bent to produce a displaced image of distant objects or the sky. The word comes to English via the French Mirage, from the Latin mirari, meaning "to look at, to wonder at". This is the same root as for "mirror" and "to admire".
You might think you are hallucinating when traveling on a hot afternoon, but mirages are a naturally-occurring optical illusion in contrast to visual hallucination. It can equally be captured on a camera.
 
31. How is food cooked in a microwave?

Cooking with Microwaves. Microwaves are produced inside the oven by an electron tube called a magnetron. The microwaves are reflected within the metal interior of the oven where they are absorbed by food. Microwaves cause water molecules in food to vibrate, producing heat that cooks the food.
 
38. What was the first country to allow females to vote?

New Zealand was the first country to allow women to vote (in 1893), while the King Abdullah of Saudi Arabia granted women the right to vote in 2011. The United States finally began allowing women to vote in 1920, after the ratification of the 19th Amendment to the Constitution.
 
40. Which is the longest word in English?

Longest Words. (45) PNEUMONOULTRAMICROSCOPICSILICOVOLCANOCONIOSIS (also spelled PNEUMONOULTRAMICROSCOPICSILICOVOLCANOKONIOSIS) = a lung disease caused by breathing in particles of siliceous volcanic dust. This is the longest word in any English dictionary.
 
41. When was the first commercial jet flight?

Then, on May 2, 1952, the British Overseas Aircraft Corporation (BOAC) began the world's first commercial jet service with the 44-seat Comet 1A, flying paying passengers from London to Johannesburg. The Comet was capable of traveling 480 miles per hour, a record speed at the time.
 
You must log in or register to reply here.
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…