What is the acronym for ribonucleic acid?

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

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

Which of the following is true about the speed of light? it depends on the wavelength.