A circuit consists of a 10-mH coil, a 12-W resistor, a 60-W resistor, a 9.0-V battery, and a switch, all in series. What is the time constant of this circuit?
a. 2.5 × 10^–3 s
c. 1.4 × 10^–4 s
b. 5.6 × 10^–4 s
d. 9.0 × 10^–2 s
C
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If elements A and B chemically bond to each other more strongly than a random mixture of A and B elements chemically bond, it is expected that a _____________ of A and B should form.
Fill in the blank(s) with the appropriate word(s).
The flatness problem and the horizon problem can be explained by ____
a. dark energy b. the inflationary universe hypothesis c. grand unified theories d. the electroweak force e. non-baryonic matter
A tennis player on serve tosses a ball straight up. As the tennis ball travels through the air, its speed
1.increases. 2.decreases. 3.decreases and then increases. 4.increases and then decreases. 5.remains the same.
The probability density for an electron that has passed through an experimental apparatus is shown in the figure
If 4100 electrons pass through the apparatus, what is the expected number that will land in a 0.10 mm-wide strip centered at x = 0.00 mm? A) 140 B) 1400 C) 450 D) 45