An insulator has a negative electric charge of 2.4 × 10^ -17 C. How many electrons were added or removed?
a. 150 electrons removed
b. 67 electrons removed
c. 150 electrons added
d. 67 electrons added
c
You might also like to view...
The moment of inertia about the x axis of the semicircular segment in Problem 5.4 is:
(A) 318 in.4 (B) 362 in.4 (C) 408 in.4 (D) 626 in.4
This star map shows stars as we see them in our sky from Earth, centered around the constellation Canis Major. Larger dots represent brighter stars, and a few of the brightest stars are identified. From this view alone, what can you conclude about Sirius?
A) It has the greatest apparent brightness of any star in this region of the sky. B) It is the most luminous star in this region of the sky. C) It is the nearest star in this region of the sky. D) It is actually a binary star system in which the second star is a white dwarf. E) All of the above choices are true.
A star's parallax can reveal its distance. Stars with larger parallaxes are ________.
A. closer B. the same distance as other stars C. farther away D. This is a trick question. Parallax cannot be measured for stars!
What is conserved when a photon collides with an electron?
A) momentum B) energy C) both of these D) neither of these