2* What is the efficiency of a machine that requires 120. J of input energy to do 35. J of "useful work output"?​

Let v1, v2, w be three linearly independent vectors in r 3 . that is, they do not all lie on the same plane. for each of the following (infinite) set of vectors, carefully sketch it in r 3 , and determine whether or not it is a vector space (i.e., a subspace of r 3 ). explain your reasoning

The consumption of fossil fuels could be

Transfer chemicals from one location to another to weather objects. a-water b-physical weathering c-chemical weathering