Does food cool faster after being in the microwave or being on the stove?

D)can be increased in a closed system

Ch4 and ph3 are both covalent since they are composed both of non-metals.    ch4 is non- polar because of  london forces and has a geometry of tetrahedral  ph3 , on the other hand, is umbrella shaped polar and has dipole-dipole intermolecular force (imf) . since ph3 is polar, it has a stronger imf   

The answer is accuracy

The answer is:   [d]:   "ultraviolet" {"  uv  "} .