Which of the following diagrams represents summer in the northern hemisphere?

What is the rms speed of cesium atoms that have been cooled to a temperature of 100 nk?

Stage in which a typical star has completely stopped fusion

The picture represents the process that produces most of the energy used by living organisms on earth. which process is represented in the picture? a) the magnetic attraction between two hydrogen nuclei. b) the fusion of hydrogen nuclei to produce a helium nucleus in the core of the sun. c) the fission of hydrogen nuclei to produce a helium nucleus in the core of the sun. d) the chemical reaction between hydrogen nuclei to produce a helium nucleus in earth's atmosphere.