If the air from problem 2 contains 22% oxygen, what is the partial pressure of oxygen near a blast furnace?

Which of the following is in the lanthanide family? a) uranium b) promethium c) silver d) gold

If you try to move a piano and are unable to move it, did you perform any work in the scientific sense of the word? yes? or no? this question is worth 20 points! let it be correct!

An engineer decides to use a slightly weaker material rather than a stronger material, since she knows that the stronger material can break suddenly. this is an example of what? a choosing a material that will show warning before it fails b using composite materials that combine strength c using a material for multiple applications d using design techniques that increase efficiency and reduce cost