Mechanical Balance: Needed to Avoid Falling
SCIENCE – Some types of toys are designed in such a way that when pushed, they can sway back and forth but cannot fall. No matter how hard the toy is pushed, it will...
How to Identify Acids and Bases
How to identify the effect of acids and bases on red cabbage juice is very easy. Ammonia, base, can trun cabbage juice green. Vinegar, an acid, can turn cabbage juice reddish.
How to Determine the North Pole of the Earth
How to determine the North Pole of the Earth in a simple way is to demonstrate the practice using simple tools.