Rank the following five capacitors in the order of the magnitudes of the charges on their plates
(a) a 20-µF capacitor with a 4-V potential difference between its plates
(b) a 30-µF capacitor with charges of magnitude 90 µC on each plate (c) a capacitor with charges of magnitude 80 µC on its plates, differing by 2 V in potential,
(d) a 10-µF capacitor storing energy 125 µJ
(e) a capacitor storing energy 250 µJ with a 10-V potential difference
1.e > a > b > d > c
2.e > d > a > b > c
3.c > b > a > d > e
4.b > a = c > d = e
4
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Fluid Flow: Water flowing through a cylindrical pipe suddenly comes to a section of pipe where the diameter decreases to 86% of its previous value. If the speed of the water in the larger section of the pipe was 32 m/s, what is its speed in this smaller section if the water behaves like an ideal incompressible fluid?
A. 43 m/s B. 37 m/s C. 28 m/s D. 24 m/s
Two metal rods, one silver and the other gold, are attached to each other
The free end of the silver rod is connected to a steam chamber, with a temperature of 100°C, and the free end of the gold rod to an ice water bath, with a temperature of 0°C. The rods are 5.0 cm long and have a square cross-section, 2.0 cm on a side. What is the temperature at the point where the two rods are in contact with one another? The thermal conductivity of silver is 417 W/(m•K) and that of gold is 291 W/(m•K) No heat is exchanged between the rods and the surroundings, except at the ends. A) 39°C B) 41°C C) 47°C D) 53°C E) 59°C
Saturn's cloud surface appears more uniform than Jupiter's because
A) there is a thick outer cloud covering of water ice overlying the colorful ices. B) due to Saturn's lower gravity, the colorful cloud layers escaped. C) it is composed of completely different gases than Jupiter's. D) the cloud layers are thicker, allowing fewer holes to see the colorful layers. E) due to Saturn's greater distance from the Sun, the colorful cloud layers are just not visible.
Eras are divided first into smaller time units called ______________
Fill in the blank(s) with correct word