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

Show answers

Another question on Physics

Physics, 21.06.2019 17:30

The position of a dragonfly that is flying parallel to the ground is given as a function of time by r⃗ =[2.90m+(0.0900m/s2)t2]i^− (0.0150m/s3)t3j^. a: at what value of t does the velocity vector of the insect make an angle of 34.0 degree clockwise from the x-axis? b: at the time calculated in part (a), what is the magnitude of the acceleration vector of the insect? c : at the time calculated in part (a), what is the direction of the acceleration vector of the insect?

Answers: 1

Answer

Physics, 21.06.2019 19:30

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

Answers: 1

Answer

Physics, 22.06.2019 04:30

The pressure increases by 1.0 x 104 n/m^2 for every meter of depth beneath the surface of the ocean. at what depth does the volume of a pyrex (bulk modulus 2.6 x 1010n/m^2) glass cube, 9.8 x 10^−2m on an edge at the ocean's surface, decrease by 7.5 x 10−10m^3? explain the formula beyond this point: p=1.0x10^4, b=2.6x10^10, l=9.8x10^−2, delta v=7.5x10^−10. at some point l needs to be cubed. why p is divided by delta v?

Answers: 2

Answer

Physics, 22.06.2019 06:40

Light traveling in a medium with a refractive index 1.19 is incident on a plate of another medium with index of refraction 1.79. at what angle of incidence is the reflected light fully polarized?

Answers: 2

Answer

You know the right answer?

Your boss asks you to design a room that can be as soundproof as possible and provides you with thre...

Questions