Three identical point charges Q are placed at the vertices of an equilateral triangle (length of each side = 2.0 m). If Q = 60 ?C, what is the magnitude of the electrostatic force on any one of the charges?
A. 25 N
B. 19 N
C. 14 N
D. 22 N
E. 16 N
Answer: C
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a. W = (?Fe ? ?fluid)ghl2. b. W = (?fluid ? ?Fe)gl3. c. W = (?Fe ? ?fluid)gl3. d. W = (?Fe + ?fluid)ghl2. e. W = (?Fe + ?fluid)gl3.
Glycerin, with a viscosity of 1.50 Ns/ m2, is flowing with an average speed of 1.20 m/s through a tube that has a radius of 5.00 mm and is 25.0 cm long. What is the drop in pressure?
A) 144 kPa B) 45.8 kPa C) 72.0 kPa D) 76.3 kPa E) 129 kPa
Why does the Moon not have a magnetic field?
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The atomic mass number of a nucleus is equivalent to which of the following numbers?
a. number of neutrons present b. number of protons present c. difference in neutron and proton numbers d. sum of neutron and proton numbers