Pls help me with this one ?! A person stretches a spring apart in their figures and holds it there, not moving this is an exmple of?
A. Potential energy turning into kinetic energy

B. Someone creating energy

C. Someone destroying energy

D. Kinetic energy turning into potential energy

Nitrogen dioxide reacts with water to form nitric acid and nitrogen monoxide according to the equation: 3no2(g)+h2o(l)→2hno3(l)+no(g) part a suppose that 4.2 mol no2 and 0.50 mol h2o combine and react completely. which reactant is in excess? express your answer as a chemical formula. nothing

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

Which position represents spring in the southern hemisphere? a) b) c) d)