RMS and Peak Quantities: A 0.150-kW lamp is plugged into a 120-V ac wall outlet. What are (a) the peak current through the lamp, (b) the rms current through the lamp, and (c) the resistance of the lamp?
What will be an ideal response?
(a) 1.77 A (b) 1.25 A (c) 96.0 ?
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The solar nebular theory has been supported by observation of dusty disks around the ________ of young, condensing stars
Fill in the blank(s) with correct word
The isotope 64Zn has a nuclear radius of 4.8 × 10^?15 m. Approximately what is the nuclear radius of the isotope 27Al?
a. 2.0 × 10^?15 m b. 2.7 × 10^?15 m c. 3.6 × 10^?15 m d. 4.0 × 10^?15 m
Consider the cosine of any angle between 35° and 40°. If the angle were doubled, what would happen to the cosine of the angle
a. It would halve. b. It would decrease to less than half its original value. c. It would decrease but be more than half its original value. d. In different cases, it could do any of the above.
A person running in place on an exercise machine for 10 min uses up 17 kcal (food calories). Another person exercises by repeatedly lifting two 2.5-kg weights a distance of 50 cm
How many repetitions of this exercise are equivalent to 10 minutes of running in place? Assume that the person uses negligible energy in letting down the weights after each lift. (1 cal = 4.186 J) A) 730 B) 2900 C) 1450 D) 2200 E) 1500