Aforce of 450n accelerated a box across a frictionless surface at a rate of 15 m/s^2. what is the mass of the box

Which best represents the law of conservation of mass ?

Due in 40 explain in terms of frame of reference if you’re inside a moving train everything on the outside can seem to be moving

Two models of the same compound are shown. in what way is model b better than model a? model b shows the types of elements in the compound, but model a does not. model b shows the three-dimensional shape of the molecule, but model a does not. model b shows how the atoms in the molecule are connected, but model a does not. model b shows the number of atoms of each element in the molecule, but model a does not