1 Compressing a spring increases its A kinetic energy
B potential energy
C electrical energy
D chemical energy

Please help immediately this is a question on my test. <3
(Science)

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

For each of the compounds below, show that the charges on the ions add up to zero. a. kbr b. cao c. li(2)o d. cacl(2) e. alcl(3)

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