The sun, which is 2.2 × 1020 m from the center of the milky way galaxy, revolves around that center once every 2.5 × 108 years. assuming each star in the galaxy has a mass equal to the sun’s mass of 2.0 × 1030 the stars are distributed uniformly in a sphere about the galactic center, and the sun is at the edge of that sphere, estimate the number of stars in the galaxy. note: the actual number of stars in the milky way is between 1011 and 4 × 1011 .

Give an example in which the electrical energy changes to light energy

4. now look at the green lines you created by connecting the three boiling point data points and the three melting point data points. for each of these lines, describe any trends you see. 5. locate the elements on your periodic table that you circled in green on your graph. what term or description would you use to identify these elements with respect to the periodic table? 7. using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid, or solid) in which each element you plotted exists at room temperature. explain your answers.

Your friend increases her force on the desk by 30n . she doesn't change the direction of her push . what happens to the net force on the desk .will the desk accelerate