You dig a small hole in the soil and the next day it rains. The hole fills with water but does not empty even after several days of dry weather. What is the soil mostly made of?
Humus
clay
sand
silty

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.

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?

Can someone me with 3 and 4 plz. this is for masteries test.