Suppose a bonfire emits co at the rate of 20 g/s on a clear night when the wind is blowing at 2m/s. if the effective stack height at the fire is 6 m, (a) what would you expect the ground-level co concentration to be at 400 m downwind?

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

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)

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