Answer:
Solar water heaters are devices that use energy from the sun to heat water. ... This metal surface, placed in contact with the water, will heat the water. Black-painted surfaces that receive the sun's heat become hotter than surfaces of any other color. The black metal plate is called a collector.
We are given with a figure in which the container is inserted with a tube. The pressure inside the tube is greater than the pressure outside the tube because primarily of the smaller area of the tube. This increases up the pressure and let the fluid rise up
The wavelength formula is λ = v/f.
100/200= .5
The wavelength is .5
It shortens so that the tips reach faster
