The frequency of the radio waves from the fm station is:

And the speed of the waves corresponds to the speed of light:

Therefore, the wavelength of the radio waves can be found by using the following equation:
Answer:
Its final velocity and how much time it takes to reach the water
Explanation:
The motion of the stone is a uniformly accelerated motion, so we can use the following suvat equation to determine its final velocity:

where
v is the final velocity
u = 0 is the initial velocity
is the acceleration of gravity
s = 52 m is the distance covered during the fall
Solving for v,

We can also find how much time it takes to reach the water, using the equation

where
v = 31.9 m/s is the final velocity
u = 0 is the initial velocity
t is the time
And solving for t,

Explanation:
As the given data is as follows.
h = 
= 
Also, we know that r = 
and Volume (V) = 
= 
= 
And, 

Putting the given values into the above formula as follows.

[tex]\frac{dh}{dt} = 1.343 m/min
or, = 134.3 cm/min (as 1 m = 100 cm)
thus, we can conclude that the height changing at 134.3 cm/min when the pile is 2 m high.
This one is easy. You just find the rise over run for the graph. Here, its 3/2 m/s.