The hotter inner core of Earth is ________ and the relatively cooler outer core is ________.
A. solid; liquid
B. liquid; solid
C. solid; also solid
D. liquid; also liquid
Answer: A
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Two thin-walled concentric conducting spheres of radii 5.0 cm and 10 cm have a potential difference of 100 V between them
(k = 1/4??0 = 8.99 × 109 N ? m2/C2) (a) What is the capacitance of this combination? (b) What is the charge carried by each sphere?
Within what percentage of the correct value would you expect an order-of-magnitude calculation to result?
1.100% 2.10% 3.1000% 4.1%
Write 0.000852 in standard powers-of-10 notation
The diagram below shows five cylinders, each cylinder rotating with constant angular velocity about its central axis. The magnitude of the tangential speed of one point of each cylinder is shown, along with each cylinder's radius and mass. Which cylinder has the largest angular momentum?
A.
B.
C.
D.
E.
