Answer:
780![ms^{-1}](https://tex.z-dn.net/?f=ms%5E%7B-1%7D)
Explanation:
The equation used to find the speed of a waveform is V = f λ
You are given
f = 1200Hz
λ = 0.65m
and need to find V
Plug in your values to the equation
V = 1200 * 0.65
V = 780![ms^{-1}](https://tex.z-dn.net/?f=ms%5E%7B-1%7D)
4.85 x10^4. This is the right answer says yahoo. I hope it helps.
Answer:
Density = 3 kg/m³
Explanation:
Given the following data;
Volume = 3m³
Mass = 9 kg
To find the density;
Density can be defined as mass all over the volume of an object.
Simply stated, density is mass per unit volume of an object.
Mathematically, density is given by the formula;
![Density = \frac{mass}{volume}](https://tex.z-dn.net/?f=Density%20%3D%20%5Cfrac%7Bmass%7D%7Bvolume%7D)
Substituting into the formula, we have;
![Density = \frac{9}{3}](https://tex.z-dn.net/?f=Density%20%3D%20%5Cfrac%7B9%7D%7B3%7D)
Density = 3 kg/m³