If you could see the new moon, at roughly what time of day would it rise?
A. at midnight
B. at sunrise
C. at sunset
D. at about noon
at sunrise
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A 4.0-kg cylinder of solid iron is supported by a string while submerged in water. What is the tension in the string? The density of iron is 7860 kg/m3 and that of water is 1000 kg/m3
A) 24 N B) 40 N C) 20 N D) 2.5 N E) 34 N
First Law of Thermodynamics: An external heat source supplies heat to a system at a rate of 187 W as the system does work at a rate of 131 W. At what rate is the internal (thermal) energy of the system changing?
A. -56 W B. 320 W C. 56 W D. 190 W E. -320 W
Where is dark matter found in the periodic table?
A) within the noble gas elements B) the transition metals C) all radioactive elements D) no where at all
The difference between lightwaves approaching and lightwaves receding is
A) when approaching, lightwaves have higher frequency; when receding their frequency is lower. B) when approaching, lightwaves have lower frequency; when receding their frequency is higher. C) the frequency of approaching lightwaves remain constant, while receding lightwaves are invisible. D) There is no difference