Explain two ways in which water’s properties help sustain life.

Earth Science

If you want to change the pitch of a sound, you have to change the

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

In this thread, i would like you to comment on the nature of light and how operation of telescopes. light has a duality of a particle and a wave; which one affects your life? also how does light interact with optics inside telescopic systems? answer these questions in two paragraphs. then respond the another students response.