What is the peak voltage in an ac circuit where the rms voltage is 120 V?
A) 84.8 V
B) 120 V
C) 170 V
D) 240 V
C
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In the figure shown, the
A. green wave is in phase with the blue wave. B. red and blue waves differ in phase by 90 degrees. C. green and blue waves differ in phase by 180 degrees. D. green and blue waves differ in phase by 360 degrees. E. both B and C.
A key feature of the theory of chaos is
A) unpredictability. B) very small initial differences can lead to very large eventual differences. C) the randomness of molecular motion makes prediction difficult. D) even orderly systems are seen to be disorderly when carefully studied.
A 400-g block of iron at 400°C is dropped into a calorimeter (of negligible heat capacity) containing 60 g of water at 30°C
How much steam is produced? The latent heat of vaporization of water is 22.6 × 105 J/kg and its specific heat capacity is 4186 J/kg ? K. The average specific heat of iron over this temperature range is 560 J/kg ? K. A) 22 g B) 33 g C) 42 g D) 54 g E) 59 g
Glow-in-the-dark materials exhibit the phenomenon called
a. phosphorescence. b. simulated absorption. c. fluorescence. d. stimulated emission.