For Science fair project you can do convection current
Explanation:
Show how to do the process
and then make a model to demonstrate
Materials required:
Potassium Permanganate,beaker,bunsen burner,water and retort stand
Answer:
0.9 m,386.36 Hz
Explanation:
We are given that
Speed of train,vs=32 m/s
Frequency of whistle,f0=350 Hz
We have to find the wavelength of sound and the frequency of heard by the listener in front of the locomotive.
Speed of sound=
We know that the frequency of listener

Using the formula


Wavelength,
Using the formula

Most of the light is absorbed.
It brings together combinations of product