If you do not hold a Texas sales and use tax permit and you bought items on which the seller did not collect Texas sales or use tax, you must report your purchases on form 01-156, Texas Occasional Use Tax.
The speed of sound is the distance travelled per unit time by a sound wave as it propagates through an elastic medium. In dry air at 20 Â°C (68 Â°F), the speed of sound is 343.2 metres per second (1,126 ft/s; 1,236 km/h; 768 mph; 667 kn), or a kilometre in 2.914 s or a mile in 4.689 s. The speed of sound in an ideal gas depends only on its temperature and composition.
The speed of sound is slow in gases, like in air. The speed of sound is faster in liquids, like in water. The speed of sound is fastest in solids, like in metal.