1. how do you calculate magnification on a microscope? explain how to focus a microscope using the high-power lens. include any safety issues you need to be aware of. why is it important to keep a microscope covered when you’re not using it? sketch what you observe when examining the onion root tip using the low-power lens and the high-power lens. label the sketches or write a brief description of your observations. sketch what you observe when examining the letter ""e"" using the low-power lens and the high-power lens. describe what you saw.

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.