Identical point charges (+20 mC) are placed at the corners of an equilateral triangle with sides of 2.0-m length. How much external energy is required to bring a charge of 45 mC from infinity to the midpoint of one side of the triangle?
a. 26 J
b. 16 J
c. 23 J
d. 21 J
e. 12 J
D
Physics & Space Science
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The heat capacity is also known as the molar specific heat.
Fill in the blank(s) with the appropriate word(s).
Physics & Space Science
Which best describes the relationship between two systems in thermal equilibrium?
a. No net energy is exchanged. c. Masses are equal. b. Volumes are equal. d. The velocity is zero.
Physics & Space Science
What are the dimensions of acceleration?
What will be an ideal response?
Physics & Space Science
Pulsars are thought to be ________
A) unstable high-mass stars B) accreting black holes C) rapidly rotating neutron stars D) accreting white dwarfs
Physics & Space Science