- Grade 11 and 12 Mathematics (Moderator: geoffrey)
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Author Question: A box contains marbles of 2 colors. There are 2 red and 3 yellow. Two marbles are selected without ... (Read 104 times) |
- Grade 11 and 12 Mathematics (Moderator: geoffrey)
In 1864, the first barbiturate (barbituric acid) was synthesized.
The average office desk has 400 times more bacteria on it than a toilet.
Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.
A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.