A single slit of width 4.0 µm is illuminated by a sodium yellow light of wavelength 589 nm. Find the intensity at a 34° angle to the axis in terms of the intensity of the central maximum.

What is the final velocity of the initial velocity of 25 and -50?

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.

The largest observatory complex in the world is on mauna kea, the tallest mountain on earth. what are some factors astronomers consider when selecting an observatory site? don’t forget practical ones. should astronomers, for example, consider building an observatory on denali (mount mckinley) or mount everest?