Which of the following is not true concerning cover crops?
a. they prevent soil erosion
b. they can fix nitrogen in soil
c. they are sold as cash crops
d. they add organic matter to soil?

Ahypothrticalax type of ceramic material is known to have a density of 2.10 g/cm3 and a unit cell of cubic symmetry with a cell edge length of 0.57 nm. the atomic weights of the a and x elements are 28.5and 30.0 g/mol, respectively. on the basis of this information, which of the following crystal structures is (are) possible for this material: sodium chloride, cesium chloride, or zinc blende

How have the greenhouse gasses increased from the year 2000 to 2018

Explain that newton first law, second law and third law of motion?