Current: A charge of 12 C passes through an electroplating apparatus in 2.0 min. What is the average current in the apparatus?

A. 0.10 A
B. 0.60 A
C. 1.0 A
D. 6.0 A


Answer: A

Physics & Space Science

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Thermodynamic Devices: A reversible engine takes in heat at a rate of 555 W and exhausts heat at 482 W.(a) How much power does it produce?(b) What is its efficiency?(c) If operated in reverse as a refrigerator, what would be its performance coefficient (COP)?

What will be an ideal response?

Physics & Space Science

Star A has an apparent magnitude of 3, and Star B has an apparent magnitude of 5. Which star is brighter in our sky?

A) Star A B) Star B C) The two stars have the same brightness in our sky, but Star A is closer to us than Star B. D) There is not enough information to answer the question.

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The exchange particles for the strong force are

A) neutrinos. B) photons. C) quarks. D) gluons. E) W+, W-, and Z.

Physics & Space Science

_________ are small luminous nebulae excited by nearby young stars

a. T Tauri stars b. Herbig-Haro objects c. O associations d. Bok Globule e. Giant molecular clouds

Physics & Space Science