Convert the units to SI unit system: 1- 120 lb/ft to kg/m
2- 6000 Btu/h to kw /h

PLEASE HELP ME OUT WITH THIS ASAP!!

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?

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)

Aheavy piece of hanging sculpture is suspended by a90-cm-long, 5.0 g steel wire. when the wind blows hard, the wire hums at its fundamental frequency of 80hz. what is the mass of the sculpture?