Try to find out about 'Fresnel' lens on an overhead projector, or stage light. What shape is its surface? Make a drawing to show how it can focus light? What could a concave Fresnel be used for?

iowichie

The sample with the lowest specific heat capacity will have the greatest temperature increase. in this case, it would be platinum.

The purpose of a lab is to do your "expirements" the importance of the topic is so you can now what the story is about and the last one is because no one is me with my question ( what is 3 over 4 x - 9 = 27 maybe you can )

Global warming was a major concern some people do not care global warming is fake it is not real the percentage of it happening  is slight