Physics, 23.02.2021 19:40 savannahsharp5149
A power source of 5 V is attached to the ends of a capacitor. The charge is 10 uC. What is the capacitance for
this capacitor?
O 0.2 uF
O 2 uF
O 0.5 UF
O 5.0 uF
Answers: 1
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Clothing made of several thin layers of fabric with trapped air in between, often called ski clothing, is commonly used in cold climates because it is light, fashionable, and a very effective thermal insulator. so it is no surprise that such clothing has largely replaced thickand heavy old-fashioned coats. (a) consider a jacket made of five layers of 0.1-mm-thick synthetic fabric (k = 0.13 w/mĀ·Ā°c) with 1.5-mm-thick air space (k = 0.026 w/mĀ·Ā°c) between the layers. assuming the inner surface temperature of the jacket to be 28Ā°c and the surface area to be 1.25 m2, determine the rate of heat loss through the jacket when the temperature of the outdoors is 0Ā°c and the heat transfer coefficient at the outer surface is 25 w/m2Ā·Ā°c. (b) what would your response be if the jacket is made of a single layer of 0.5-mm-thick synthetic fabric? what should be the thickness of a wool fabric (k = 0.035 w/mĀ·Ā°c) if the person is to achieve the same level of thermal comfort wearing a thick wool coat instead of a five-layer ski jacket?
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Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf Īµ. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 Ļ, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?
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