Which of the following is the best example of a closed system?
a. the inside of a volcano
b. a hermit crab in a shell
c. a jar of pond water with a lid on it
d. a garden with a fence around it

Nitrogen (n), phosphorus (p), and potassium (k) are the main nutrients in plant fertilizers. according to an industry convention, the numbers on the label refer to the mass percents of n, p2o5, and k2o, in that order. calculate the n: p: k ratio of a 30: 10: 10 fertilizer in terms of moles of each element, and express it as x: y: 1.0.

If two objects at different te, peraure are in contact with each other what happens to their temperature

How do i turn 2 s into one in the products