Notice in the picture of sedimentary rocks, there is one layer on top of the other. The oldest rocks are on the bottom of the pile and the youngest or most recent rocks are on the top of the pile. This is known as the law or principle of

A) superposition.

B) horizontality.

C) uniformatarianism.

D) cross cutting relationships.

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

If you add 5.00 ml of 0.100 m sodium hydroxide to 50.0 ml of acetate buffer that is 0.100 m in both acetic acid and sodium acetate, what is the ph of the resulting solution? acetic acid: ka = 1.8. x 10-5

Ab c or d ? i’m not sure what the answer is