00:01
For this problem, we want to find the rate of change for the speed of sound v in meters per second with respect to air temperature t.
00:13
And let's write that out.
00:15
So rate of change of v, this is the speed of sound as given by the problem with respect to the air temperature t, capital t, and we're also given the following that v, the speed of sound in this case, and v is equal to 20, multiply by the square root of t, the air temperature.
00:58
So in order to find the rate of change of the speed of sound with respect to the air temperature, using this equation that we were given, we will find the derivative of this, and that will essentially be our rate of change.
01:15
So to find the derivative of v with respect to t, we can first rewrite this.
01:24
V is equal to 20 times the square root of t.
01:32
So we're doing this with respect to t, so we're going to be working with this square root of t.
01:37
So we can rewrite this first as 20 times t to the one -half power.
01:44
And then we would take the derivative.
01:50
So we take this term, move it down, and then multiply it by this constant term as well...