Speed can sometimes be negative
Indicate whether the statement is true or false
T
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If the AA designation of an alloy has three digits, it is a(n) _________alloy.
Fill in the blank(s) with the appropriate word(s).
A lightbulb is connected to a 120 V(rms), 60 Hz source. How many times per second does the current reverse directions?
A. 60 B. 130 C. 120 D. 30
A Carnot cycle is operated in reverse as a refrigerator taking in 36. J every minute and "dumping" 40. J per minute at a room temperature of 23.°C. The net entropy increase per minute is
A) 0.13 J/°K B) 36.J/°K C) 0.15 J/°K D) zero E) 0.15 kJ/°K
Find the magnetic energy stored in the air gap between two very large magnetic pole pieces, one North, one South, each with an area of 100 cm2 . Assume the 0.05-T magnetic field is uniform within the 2-cm gap