Achemical change in a reaction of acids and bases can be indicated by a change in color ? size ? shape ? volume ?

Explain what makes a passenger in a turning car slide toward the door. critical thinking

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

The atoms in a nickel crystal vibrate as harmonic oscillators with an angular frequency of 2.3 × 1013 rad/s. the mass of a nickel atom is 9.75 × 10-26 kg. what is the difference in energy between adjacent vibrational energy levels of nickel? (h = 6.626 × 10-34 j • s, , 1 ev = 1.60 × 10-19 j)