wash the pH probe with distilled water and then dry it clean with tissue paper before and after testing the pH.
42,000 year
It depends on what type of chemcial engineer that you are.
An estimated 250,000,000,000,000 a year.
Abranham Darby invented coke smelting, in the year of 1709. KalaBadala :)
Earthworms! :D
Charles Darwin received his bachelor's degree from the University of Cambridge in 1831.
Charles Darwin was put on the ten pound note in the year 2000
1826
Charles Darwin's name was Charles Robert Darwin.
1836
1998
in the year 50000000000.1 Actually, Charles Darwin died around April 19, 1882.
Charles Darwin arrived in the Galapagos Islands in 1835 during his voyage on the HMS Beagle.
The HMS Beagle was the ship that carried Charles Darwin on his famous five-year voyage from 1831-1836.
Charles Darwin went on a five year trip on the HMS Beagle ship. He set off in 1831 and returned in 1836 after making many discoveries
Charles Darwin was a naturalist.