9. Which statement is correct? (A) "Heat" is the energy of the random motion； (B) Neither "heat" nor "work" belongs to a system； (C) A "heat reservoir" possesses a lot of heat； (D) All； (E) None.

12. Which is not correct for the dielectric constant ( x ) of a substance? (A) It is a measure of the response of its charges to an external electric field； (B) The capacitance of a capacitor can be enhan ced by a factor of n when filling with this substance； (C) k = 0 for an ideal conductor； (D) All； (E) None.

9. Which statement is correct? (A) "Heat" is the energy of the random motion； (B) Neither "heat" nor "work" belongs to a system； (C) A "heat reservoir" possesses a lot of heat； (D) All； (E) None.

其他試題

9. Which statement is correct?
(A) "Heat" is the energy of the random motion；
(B) Neither "heat" nor "work" belongs to a system；
(C) A "heat reservoir" possesses a lot of heat；
(D) All；
(E) None.