Consider a 30-foot chain that weighs 5 pounds per foot hanging from a winch 30 feet above ground level. Find the work done by the winch in winding up the entire chain.

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f

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)

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these