Physics, 30.08.2019 21:10 tddreviews
a. an object moves from point a to point b to point c, then back to point b and then to point c along
the line shown in the figure below.
1) find the distance covered by the moving object.
2) find the magnitude and direction of the displacement of the object.
Answers: 3
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Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.
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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/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?
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An automobile steering wheel is shown. what is the ideal mechanical advantage? if the ama is 8, what is the efficiency of the steering wheel?
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Frequency of electromagnetic waves that a radio station is assigned is called
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a. an object moves from point a to point b to point c, then back to point b and then to point c alon...
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