Decibels.
Air coolers are not effective in humid conditions, so are not suitable for Kolkata. Air conditioners are what is needed.
depends on the needed measurement and type of triangle.
what geogaphical features are needed when building a hydroelectric dam
It depends on the building
Arrowhead water is available in coolers for household or office needs. The varieties of coolers vary from a cooler that has both hot & cold water capabilities, as well as coolers that provide water at room temperature so that electricity is not needed.
density
Britain started building dreadnoughts because they needed to fight for the war and needed protection.
To know the quantity of matter present in the element or a thing
Titration experiments mainly Where accuracy in measurement is needed
3 or 4
lightning protection is needed because the higher and biger a building the more chance it has to get hit by lightning.
I needed my safety helmet if I would be building anything.