<u>Answer</u>
a) properties and hazards
<u>Explanation</u>
Having information on properties of a chemical helps you know the reactivity of that chemicals.
Most chemicals are very reactive. So you have to be away of their hazards to avoid accidents.
Answer:
Pinhole Projection
Explanation:
You will get a great view if you project a sunlight coming thrugh a small hole onto a viewing card enclosed in a long box. The smaller the pinhole, the sharper the image
Increases exponentially is your correct answer