Question 1
Question 2
Ask unlimited questions for free
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.
For a complete list of videos, visit our video library