Recent content by erik

Hey, thanks for the reply mathman. That's what I presumed regarding the spray as well, some sort of vehicle for the deet. But as far as the general statement, the way I understood his statement was that even an element such as gold or calcium, etc... cannot be "pure," that within our...

Hi, I am not sure if this is the correct section for this question but it seems to involve both physics and chemistry so I will start here. In a recent conversation a friend stated that no substance within the Earth's atmosphere can be 100 percent pure. It needs to be in space or some...

sorry if I'm not getting it? why isn't biology taken into consideration in the solution?

thanks, still not sure I understand? because the person is using more muscles and a fuller range of motion with the muscles when traveling up the steeper side wouldn't that use up more energy? thanks

hello, I would like to apologize for my ingnorance in advance. I have a question. If a person were going to walk up a hill and had the choice of going up either side, one side has a much steeper grade than the other. which side would require less energy? or would they both require the...