1.

What are the bad effortof smoking and drinking liquor on the society​

Answer»
  • \huge\red{\mid{\fbox{\tt(answer)}\mid}}about 343 METRES per second
  • The speed of sound is the DISTANCE travelled per UNIT of time by a sound wave as it propagates through an elastic medium. At 20 °C (68 °F), the speed of sound in air is about 343 metres per second (1,235 km/h; 1,125 ft/s; 767 mph; 667 kn), or a kilometre in 2.9 s or a mile in 4.7 s.


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