If your heart is beating at 76 beats per minute what is the frequency of your heart's oscillations

Blank liquids and gases exert a buoyant force on objects placed in them

Organelles are 1. responsible for producing power for the cell 2. tiny structures in the cell that carry out the cell's activities 3. responsible for digestion in the cell 4. found outside of the membrane

I’ve been stuck on this for a while