Which can occur in a physical change? the mass can increase. the particles can arrange in different ways. the mass can decrease. the atoms can bond to different atoms.

If you have a bowl with six apples and you take away four, how many do you have? anyone take a guess and post it. lol getting rid of my account might as well do it with some fun

Which statement is true for light passing into a medium that is more optically dense than the first medium through which it past

An electron and a proton have the same kinetic energy upon entering a region of constant magnetic field and their velocity vectors are perpendicular to the magnetic field. suppose the magnetic field is strong enough to allow the particles to circle in the field. note: you'll need to look up the masses for an electron and proton. 1) what is the ratio of the radii of their circular paths rp/re?