how big would the coefficient of static friction between the upper and lower block have to be so that the upper block would not slip on the lower block?

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom

How do you determine the percent yield of a chemical reaction

The reaction below shows a system in equilibrium. how would a decrease in temperature affect this reaction? a. the rate of formation of the gases would increase. b. the equilibrium of the reaction would shift to the left. c. the equilibrium would shift to cause the gases to sublime into solids. d. the chemicals on the left would quickly form the chemical on the right.