As heat is taken away from a fluid, its particles. slow down and come closer together. ï®. This causes the fluid to contract â its volume. decreases. ï®. This causes the density to increase. (D=M/V if V gets smaller, M/V gets bigger) ï®. Viscosity will also be affected, as particles slow. down and come closer together, it gets harder. for them to move past each other. Therefore, viscosity increases.
The commercial kind are probably $250 on up. You can get a nice Shure brothers mike for around $120. Their SM-58 is good for recording and amplifying voices, and the SM-57 excels at recording or amping musical instruments. Sennheiser is a long-time company that also makes several lines of mikes (or mics, if you prefer) that range from home-use to phenomenal studio use.
The Sony SRS-X3, one of the smaller models in Sony's 2014 lineup of portable Bluetooth speakers, stands out as one of the better minis out there and is a likable wireless speaker for its compact size and $150 price point (Â£129 UK, AU $199).ts design is straightforward and elegant and the speaker itself has a nice, smooth-to-the-touch finish. It comes in a few different colors, including black, red, and the white model I tested. Alas, no protective carrying case is included, but Sony does sell one for $20.