Astationary front does not move because winds on both sides of the front a. are calm b. blow away from the front and are of equal strength c. blow against each other and are of equal strength d. blow parallel to the front and in opposite directions

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.

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)

Give an example in which the electrical energy changes to light energy