Which of the following does NOT contribute to the thermoelectric effect?
e.
This statement is not true. The magnetic moments of electrons within metals do not necessarily align when heated, and most often heating disrupts the alignment of the magnetic moments. This occurs in ferromagnets and paramagnets.
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Suppose that when we add 20.8 J to 1 mol of a certain gas, its temperature is observed to increase by 1 K. Which of the following statements is true?
A. This gas is monatomic. B. This gas is diatomic. C. This gas is polyatomic. D. One cannot determine the type of gas without information that we are not given. E. The results described are impossible.
A planet with a higher reflectivity will do which of the following?
A) reflect more light and absorb less light B) reflect less light and absorb more light C) emit more light D) emit higher energy light E) transmit more light
A satellite follows an elliptical orbit about a planet as shown. The speed of the satellite is greatest when the satellite is in position
1) A. 2) B. 3) C. 4) D. 5) same at all points in its orbit. At which position is there no component of force in the direction of the satellite's instantaneous velocity? 6) A 7) B 8) C 9) D 10) A component of force exists in the direction of instantaneous velocity at every point along the orbital path.
If a star has a parallax of 0.02 seconds of arc, then its distance is
a. 20 pc. b. 50 pc. c. 2 pc. d. 5 pc. e. 500 pc.