The wavelength of red light is 7 x 10^-7 meter. Express this value kn nanometers

The sun generates both mechanical and electromagnetic waves. which statement about those wave is true?

You have a pick-up truck that weighed 4,000 pounds when it was new. you are modifying it to increase its ground clearance. when you are finished

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?