Materials that do not transfer mechanical energy well. These tend to be soft, flexible, low density, and with high surface area to linear area ratios. Open cell foams and fabrics are among the best at absorbing sound.
Dirt?
solid
Each year, they rotated the kinds of crops planted
This was the time when weapons and materials were made from bronze because other materials were not available. Population also began to grow during this time period.
This seems like a question from an electrical course, and is probably best answered by your course materials.
clothes are the most absorber of sound
metal
Of the four materials, wire will carry the sound best because it is the most dense.
The water has a molecule that makes it drowned the sound of herotedic sound which if it is a heterozygous (salt water) travels vert fast
the more smooth the surface is the better the sound is
glass wool
PAMPERS deffinitly, I used this for my son and tried all kinds and found that pampers was the best brand.
carpets, curtains and wood are best at muffling sound carpets, curtains and wood are best at muffling sound
go to wikipedia
sound can travel through air , water and lots more
Although unfamiliar with fly tying materials it has been found that these are used in the sport of fly fishing. Some of the best kinds of fly tying materials are feathers and beads,
No material reflects all light. Silver is pretty close, which is why it is used for mirrors. As far as absorbing, porous black materials do the best job.