In our study of thermodynamics we look at changes in the internal energy of systems. to do so we consider thermodynamic quantities to consist of two parts what are they why do we take the systems point of view?

How will the emission of an alpha particle affect the atomic number of an atom

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

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.