A magnifying glass. Binoculars. A telescope. A miscroscope.
Hand lens.
phenyle blue was a common dye used in biology when I was in college. You need to check to see what the particular item you are wanting to look at will react with first, though.
Only if you are dividing by a decimal or a fraction.
This approach is known as sampling, where researchers examine a representative subset of a larger population or phenomenon to draw conclusions about the whole. By analyzing this smaller group, they can identify patterns, trends, or characteristics that are likely present in the larger context. Sampling is commonly used in fields like statistics, social sciences, and market research to make informed decisions without needing to study the entire population.
No; however, silver is used to make mirrors.
Magnifying glass
A magnifying glass is a hand-held instrument used to make an item look larger by magnifying its image when viewed through the lens.
Hand lens.
Hand lens
That sounds like a magnifying glass.
magnifying glass
spy glass
Binocular
It is a magnifying glass. A microscope is also used but is not technically hand-held and the majority of the time has more than one lens.
A magnifying glass or a microscope.
The instrument used to make extremely small things look larger so humans can see them is a microscope.
Make the price of the item larger than what it cost to actually get them and sell.