Elements are arranged in the periodic table based on their mass number atomic number atomic mass percent abundance

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

Identify the electromagnets with poles that are reversed from the electromagnet shown above

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.