A series circuit consists of a 0.55-H inductor with internal resistance of 8.0 ? connected in series with a 4.0-? resistor, an open switch, and an ideal 12-V battery
(a) When the switch is closed, what is the initial current through the 4.0-? resistor?
(b) What is the current through the 4.0-? resistor a very long time after the switch is closed?
(a) 0.00 A (b) 1.0 A
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A baseball pitcher loosens up his pitching arm. He tosses a 0.20-kg ball using only the rotation of his forearm, 0.32 m in length, to accelerate the ball. What is the moment of inertia of the ball alone as it moves in a circular arc with a radius of 0.32 m?
a. 1.5 × 10^-2 kg•m2 c. 4.0 × 10^-2 kg•m2 b. 2.0 × 10^-2 kg•m2 d. 7.6 × 10^-2 kg•m2
The ____________________ of a black hole in a binary system can emit X-rays and allow us to detect the presence of the black hole
Fill in the blank(s) with correct word
A gold-plated (gold-covered) piece of jewelery, such as a bracelet, is
a. a compound. b. a heterogeneous mixture. c. a homogeneous mixture. d. an element.
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Answer the following statement true (T) or false (F)