In the circuit shown in Figure OQ28.12, each battery is delivering energy to the circuit by electrical transmission. All the resistors have equal resistance. Rank the magnitudes of the currents at the same points from greatest to least, noting any cases of equality
1. b > c > a = e > d
2. a > d > b = c > e
3. e > a = b > c = d
4. c = d > b > a > e
3
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A rod with a diameter of 2.00 mm, projects 20.0 mm horizontally outward from a wall. A 10.0 N weight is hung from the end of the rod and the rod deflects downward by 
The shear strain of the rod is
A. 
B. 
C. 
D. 
E. 
Which statement about a single thin lens is correct?
A) A converging lens always produces a real inverted image. B) A diverging lens always produces a virtual inverted image. C) A converging lens sometimes produces a real upright image. D) A diverging lens always produces a virtual upright image. E) A diverging lens produces a virtual upright image only if the object is located between the lens and its focal point.
What happens to a sample of water when it is heated between 4°C and 100°C?
a. Its volume increases. b. Its volume is reduced. c. It vaporizes. d. Nothing changes except its temperature.
Cells at the top of a tree have a higher concentration of sugars than cells at the bottom. How might this fact assist a tree in moving water upward from its roots?
A) Cells with high concentrations of sugar are more dense. As these cells migrate downwards, cells containing fresh water are able to migrate upwards. B) Water is pushed upwards by osmostic pressure. C) It doesn't. In fact, water makes it to the top of a tree because that is where the water molecules are being evaporated. D) Fresh water is drawn upwards to the sugar containing cells by way of dipole-dipole molecular interactions.