How many neutrons does element x have if its atomic number is 48 and its mass number is 154?

The force will determine the acceleration.

Which lists the organs in the correct order as food passes from the mouth to anus?

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)