Determine the total frozen fraction after 60 minutes of cooling if the tubes are in a staggered arrangement instead of the in-line arrangement.
What will be an ideal response?
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A thin beam of light enters a thick plastic sheet from air at an angle of 32.0° with the normal and continues in the sheet at an angle of 23.0° with the normal. What is the index of refraction of the plastic?
A) 0.74 B) 1.11 C) 1.28 D) 1.36
Systems alone tend to move toward
A) order. B) disorder. C) temperature inversions. D) none of the above
Astronomers use ________ to determine the magnetic field of white dwarfs.
A. the Zeeman splitting of spectral lines B. the doppler effect C. conservation of angular momentum D. Wien's law
A series LR circuit includes a 9.0 V battery, a resistance of 0.50 
and an inductance of 0.80 H. What is the induced emf 2.0 s after the switch has been closed?
A. 0.0 B. 9.0 V C. 5.2 V D. 2.6 V E. 19 mV