What is expression gives the efficiency of an ideal heat engine operating between a higher temperature Th and a lower temperature Tc (both expressed in kelvins)?
a. = 1 + Tc / Th
b. = 1 – Tc / Th
c. = 1 – Th / Tc
d. = 1 – Tc
e. = Tc / Th
b
You might also like to view...
All the following statements are true. Which one can be attributed to the exclusion principle?
A) If we know the location of an electron quite well, we will have little idea where it is going next. B) If an electron and antielectron meet, they will turn into energy through mutual annihilation. C) An electron has energy equal to its mass times the speed of light squared. D) Two electrons with the same spin cannot occupy the same energy level in an atom.
Energy in Nuclear Reactions: An electron and a positron, both essentially at rest, annihilate each other, emitting two identical photons in the process. What is the wavelength of these photons? The mass of an electron or positron is 9.11 × 10-31 kg. (h = 6.626 × 10-34 J ? s, c = 3.00 × 108 m/s)
A. 1.21 × 10-12 pm B. 1.73 pm C. 2.42 pm D. 3.07 pm E. 3.46 pm
________ is the color of the lowest frequency visible light
Fill in the blank(s) with correct word
A radioactive substance with a half-life of 3 days has an initial activity of 0.24 Ci. What is its activity after 6 days?
A) 0.48 Ci B) 0.02 Ci C) 0.06 Ci D) 0.23 Ci E) 0.12 Ci