For the circuit shown, what is the rate of change of the current in the inductor when the current in the battery is 0.50 A?
a.
600 A/s
b.
400 A/s
c.
200 A/s
d.
800 A/s
e.
500 A/s
c
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A train starts from rest and accelerates uniformly until it has traveled 5.6 km and acquired a forward velocity of The train then moves at a constant velocity of for 420 s. The train then slows down uniformly at until it is brought to a halt
The acceleration during the first 5.6 km of travel is closest to which of the following? A) 0.16 m/s^2 B) 0.14 m/ s^2 C) 0.17 m/ s^2 D) 0.19 m/ s^2 E) 0.20 m/ s^2
The wavelength from an FM station broadcasting at 93.9 megahertz on your radio is
a. 31.3 m b. 3.13 m c. 0.313 m d. 0.0313 m e. none of the above
In the proton-proton cycle, two positrons are produced. What are they similar to, and how are the different? What happens to them?
What will be an ideal response?
Specific Heat: 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. 1450 C. 1500 D. 2200 E. 2900