If igneous rock is placed under conditions of extreme heat and pressure, which type of rock will it become?

What color of light must blue light mix with to create white light? a. yellow b. white c. blue d. green

Light from the sun reaches the earth in 8.3 minutes. the velocity is 3.00 x 10^8 m/s. how far is earth from the sun? i know how to get to d = (3 x 10^8 m/s)(498 sec). i just don't know how to get from there to the answer being 1.5 x 10^11 m.

What is a carrier wave and how does it affect what you hear on the radio