Two thin-walled concentric conducting spheres of radii 5.0 cm and 10 cm have a potential difference of 100 V between them
(k = 1/4??0 = 8.99 × 109 N ? m2/C2)
(a) What is the capacitance of this combination?
(b) What is the charge carried by each sphere?
(a) 11 pF (b) 1.1 nC
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The Widmanstätten patterns found in some meteorites show that the material
a. cooled very slowly. b. cooled very rapidly. c. was never heated to the point of being molten. d. was molten just before it entered Earth's atmosphere. e. is composed primarily of organic compounds.
An ideal reversible heat pump is taking heat from the outside air at -10.0°C and discharging it into the house at 18.0°C. What is the coefficient of performance of this heat pump?
A) 10.4 B) 9.44 C) 0.644 D) 0.533 E) 0.0962
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Reference: Ref 5-1
The latent heat of fusion is the amount of energy per kilogram necessary to go from point ______________ to point ______________.
Mass and Weight: What is the mass of an object that experiences a gravitational force of 685 N near Earth's surface where g = 9.80 m/s2?
A. 69.9 kg B. 68.5 kg C. 71.3 kg D. 72.7 kg