Answer:
i think the first one is gravity and second one is rotation
Explanation:
I would say the last one because unlike beta and alpha rays they will have no effect on the mass or atomic number because they are just composed of high energy radiation
Covalent since they are both non metals, a metal and a non metal make an ionic bond
Mass = 39.0 gal × (3.785 L/1 gal) × (1000 mL/1 L) × (0.789 g/1 mL) × (1 lb/453.6 g) = 257 lb
