Physics, 30.08.2019 10:50 albattatasraap5wymy
Your boss asks you to design a room that can be as soundproof as possible and provides you with three samples of material. the only information on each sample's label is the material's coefficient of absorption. the coefficient of absorption listed on sample a is 30%, on sample b is 47%, and on sample c is 62%. when your boss asks for your choice and the reasoning behind it, what would you tell him?
a. sample a would be best, because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the largest.
b. sample a would be best, because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the smallest.
c. sample c would be best, because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the smallest.
d. sample c would be best, because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the largest
Answers: 2
Physics, 22.06.2019 15:20, mjwaple57
Acarpenter builds an exterior house wall with a layer of wood 2.9 cm thick on the outside and a layer of styrofoam insulation 2.3 cm thick on the inside wall surface. the wood has k=0.080w/(m⋅k), and the styrofoam has k= 0.010 w/(m⋅k). the interior surface temperature is 19.0 ∘c , and the exterior surface temperature is -15.0 ∘c . a.)what is the temperature at the plane where the wood meets the styrofoam? celsius b.)what is the rate of heat flow per square meter through this wall? /m^2
Answers: 2
Physics, 22.06.2019 19:30, unknownday7
What characteristics of hv2112 make it the best candidate to be classified as a thorne-zytkow object?
Answers: 3
Physics, 23.06.2019 00:30, ehaynie
Which of the following statements are true for an isothermal process? check all that apply. - during an isothermal process, the work done by the gas equals the heat added to the gas. - during an isothermal process, the internal energy of the system changes. - an isothermal process is carried out at constant temperature. - an isothermal process is carried out at constant pressure. - an isothermal process is carried out at constant volume.
Answers: 1
Physics, 23.06.2019 02:30, pruittjr5161
Based on its type of chemical bond, which of the following has the highest boiling point? potassium chloride ethyl alcohol water ammonia
Answers: 1
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