Which type of atom is the standard on which the atomic mass scale is based?
a. 12C
b. 16O
c. 1H
d. 56Fe
a
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A general name for an intrusive igneous rock formation is ______________
Fill in the blank(s) with correct word
A certain glass window reduces the intensity level of the sound from 72 dB to 47 dB. By what factor is the acoustic power reduced by this glass window?
A) 3.2 × 10-3 B) 2.2 × 10-2 C) 5.6 × 10-2 D) 1.0 × 10-1 E) 1.5 × 10-1
According to the following figure, as you increase in altitude in Earth's lower atmosphere, the atmospheric pressure ________ dramatically at a(n) _________ rate.
a. increases; increasing b. increases; decreasing c. decreases; decreasing d. decreases; increasing e. decreases; constant
A piece of copper of mass 100 g is being drilled through with a 1/2" electric drill. The drill operates at 50.0 W and takes 30.0 s to bore through the copper. If all the energy from the drill heats the copper, find the copper's increase in temperature. (ccopper = 387 J/kg • °C.)
a. 40.6°C c. 31.0°C b. 38.8°C d. 27.3°C