Question
What is the speed of sound in air at room temperature
(approx)? ÂSolution
At room temperature (~20°C), speed of sound in air is around 343 m/s.  This speed increases in solids and liquids and decreases at higher altitudes.  It is much slower than light, which travels at 3 × 108, m/s.  That's why we see lightning before hearing thunder.
The motion of a freely falling body is an example of ______________ accelerated motion.
Minimum Distance for proper vision isÂ
The instrument which uses sound waves to measure the depth of oceans is –
Which of the following is the best fire-extinguisher?
Pulsars are :
Which of the following Instrument is used to measure humidity?
Which of the following physical quantities is scalar quantity ?  Â
UNO was established on?
Which medium cannot propagate sound waves?
The momentum of a body depends on:
