What is the relationship between density, matter, mass, and volume? can someone explain thoroughly? ! detailed, thoughtful answers are appreciated!

What is the difference between electrically neutral objects and electrically charged objects

Acar of mass m goes around a banked curve of radius r with speed v. if the road is frictionless due to ice, the car can still negotiate the curve if the horizontal component of the normal force on the car from the road is equal in magnitude to 101) a) mv2/r b) mg/2. d) mg e) tan[v2/(eg)]

Arowboat passenger uses an oar to push the boat off the dock by exerting a force of 40n for 3.0s. what impulse acts on the boat.