when we talk about ourselves, our opinions, and the things that happen to us, we generally speak in the first person. the biggest clue that a sentence is written in the first person is the use of first-person pronouns. in the first sentence of this paragraph, the pronouns appear in bold text. we, us, our, and ourselves are all first-person pronouns. specifically, they are plural first-person pronouns. singular first-person pronouns include i, me, my, mine and myself.

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In a system, when potential energy decreases, then entropy also decreases. true false

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/m·°c) with 1.5-mm-thick air space (k = 0.026 w/m·°c) between the layers. assuming the inner surface temperature of the jacket to be 28°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 0°c and the heat transfer coefficient at the outer surface is 25 w/m2·°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/m·°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?