From the center outward, the correct order is:
A) liquid iron inner core, solid nickel outer core, rocky mantle, silicate crust.
B) solid metallic inner core, molten metal outer core, silicate mantle and crust.
C) solid metal core, molten metal hydrosphere, rocky lithosphere, gases in atmosphere.
D) solid rock core, liquid metal mantle, solid rock crust.
E) molten metal hydrosphere, molten rock lithosphere, solid silicate crust.
B
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As the ac frequency in an RLC circuit is increased to very high values, which of the contributions to the impedance dominates?
A. the capacitive reactance B. the inductive reactance C. the resistance D. the combined capacitive reactance and the resistance E. More information is needed.
Uniform Circular Motion: In a carnival ride, passengers stand with their backs against the wall of a cylinder. The cylinder is set into rotation and the floor is lowered away from the passengers, but they remain stuck against the wall of the cylinder. For a cylinder with a 2.0-m radius, what is the minimum speed that the passengers can have so they do not fall if the coefficient of static friction between the passengers and the wall is 0.25?
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