starmoonsun SG A scientist carry out an expt to determine the speed of sound in air by employing a friend to fire a cannon at a certain distance and then timing the interval between the sight of the smoke and the sound of the "boom". distanct is 500m and the time taken is 1.6s. If the speed of light is 300 000km/s and is taken into account. what will be the new speed of sound in air? the ans is 312.6m/s... im sorry! missed out a line =x
Lexanez SG A level question? What values are given? How far is the scientist standing from his friend? How long before he heard the sound after the spark is seen?
unclebutcher SG certain information is missing eg i think distance btw scientist and friend. pls write out the full question and i can help
eagle SG Think the answer is not very accurate Speed of sound = Distance divided by time . = 500 / 1.6 . = 312.5 m/s
hisoka SG cannot be solved. we have no idea if the smoke is produced at the same time as the sound. even if we do, time we see smoke is affected by wind, temperature etc. when can we actually see the smoke? wheres the reaction time? there might be different time for different sensory inputs.
unclebutcher SG assuming no reaction time 300,000km/s = 300,000,000m/s 500/300,000,000=1.67*10^-6 S for light to travel to scientist. 500m/(1.6-0.00000167sec)=500m/(1.59999833)=312.500326m