Physics, 29.11.2020 15:10 Redeyestudio53
An echo is sound that returns to you after being reflected from a distant surface (e. g., the side of a cliff). Assuming that the distances involved are the same, an echo under water and an echo in air return to you
a. at different times, the echo under water returning more slowly.
b. at different times, the echo under water returning more quickly.
c. at the same time
Answers: 2
Physics, 22.06.2019 06:20
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?
Answers: 1
Physics, 22.06.2019 16:40
Acapacitor is storing energy of 3 joules with a voltage of 50 volts across its terminals. a second identical capacitor of the same value is storing energy of 1 joule. what is the voltage across the terminals of the second capacitor?
Answers: 3
Physics, 23.06.2019 02:00
If a nissan titan has a mass of 2,300 kilograms how many grams is that
Answers: 1
Physics, 23.06.2019 04:31
Which of the following is probably the least necessary character trait needed to be a good clinical nurse?
Answers: 3
An echo is sound that returns to you after being reflected from a distant surface (e. g., the side o...
Mathematics, 08.05.2020 23:57
Mathematics, 08.05.2020 23:57
History, 08.05.2020 23:57
Mathematics, 08.05.2020 23:57
Social Studies, 09.05.2020 00:57
Mathematics, 09.05.2020 00:57
English, 09.05.2020 00:57
History, 09.05.2020 00:57
English, 09.05.2020 00:57