Charge of uniform density (40 pC/m2) is distributed on a spherical surface (radius = 1.0 cm), and a second concentric spherical surface (radius = 3.0 cm) carries a uniform charge density of 60 pC/m2 . What is the magnitude of the electric field at a point 4.0 cm from the center of the two surfaces?
a. 3.8 N/C
b. 4.1 N/C
c. 3.5 N/C
d. 3.2 N/C
e. 0.28 N/C
b
Physics & Space Science
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A refrigerator extracts 65.0 J of heat from a heat reservoir at 
If the coefficient of performance of the refrigerator is 2.50, then how much heat is discharged out of the refrigerator?
A. 125 J B. 91.0 J C. 75.0 J D. 55.0 J
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The Milky Way galaxy is part of
a. the Virgo cluster. b. the Large Magellanic Cloud. c. the Small Magellanic Cloud. d. the Local Group. e. a rich cluster.
Physics & Space Science
Gravity acts over a limited distance range
a. True b. False Indicate whether the statement is true or false
Physics & Space Science
If CP for an ideal gas is 35.4 J/mol/K, which of the following is CV for this gas?
a. 12.5 J/mol/K b. 20.8 J/mol/K c. 29.1 J/mol/K d. 27.1 J/mol/K e. 43.4 J/mol/K
Physics & Space Science