What capacitance is needed in series with a 30 resistor at 1.0 kHz for a total impedance of 45 ?

A. 34 F

B. 15F

C. 4.7F

D. 0.037F


C. 4.7F

Physics & Space Science

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Choose the list that is correct in order of size from largest to smallest

A) amino acids, genes, carbon dioxide, DNA B) genes, amino acids, DNA, carbon dioxide C) carbon dioxide, amino acids, genes, DNA D) DNA, genes, amino acids, carbon dioxide E) DNA, genes, carbon dioxide, amino acids

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A 50-kg child riding a Ferris wheel (radius = 10 m) travels in a vertical circle. The wheel completes one revolution every 10 s. What is the magnitude of the force on the child by the seat at the highest point on the circular path?

A. 0.29 kN B. 0.49 kN C. 0.69 kN D. 0.20 kN E. 0.40 kN

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When a hydrogen atom absorbs a photon that raises it to the n = 5 state, how many different energies are possible for the photon(s) that may be emitted as the atom eventually returns to the ground state?

a. 4 b. 5 c. 6 d. 10 e. The correct answer is not given.

Physics & Space Science

Conditions for the preservation of fossils are best achieved

A) in desert environments. B) in glaciated environments. C) in shallow river beds. D) on the floors of shallow seas.

Physics & Space Science