00:01
Hello students, in this question we are given a speed of the object 24 degree centigrade is mach 0 .33 and we have to find the speed of the object in land.
00:27
Okay, before going to everything we have to know what is mach.
00:34
Mach number is the ratio of the speed of an object to the speed of the sound, both of them in the same medium.
01:00
So this ratio is given as mach number.
01:04
So now we have to find the speed of the object on land.
01:08
So speed of the object is, here the speed of object is, we have to cross multiply that is mach number into speed of the sound.
01:26
Here the temperature is given at 24 degree centigrade.
01:30
Therefore the speed of the sound will also be at 24 degree centigrade.
01:33
But we know that we don't know the speed of the sound at 24 degree centigrade.
01:38
But the speed of the sound at 20 degree centigrade we know that is sound at 20 degree centigrade is 343 meter per second and we know that for every degree centigrade, for each for every degree centigrade the speed of sound increases by 0 .6 meter per second.
02:18
Therefore the increase in speed of the sound that is the increase in speed of the sound or the increase of 4 degree centigrade is equal to 0 .6 into 4 which is equal to 2 .4 meter per second.
02:41
Therefore the speed of the sound 24 degree centigrade is equal to 343 plus 2 .4 which is equal to 345 .4 meter per second.
03:06
So now the speed of the sound at 24 degree centigrade is calculated.
03:10
Now we have to just cross multiply, multiply the speed of the sound at 24 degree centigrade with the mach number...