What temperature is absolute zero in Fahrenheit?

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line