** asap ! **
how can astronomers determine a star’s chemical composition?
a. by looking at its temperature
b. by using a spectrograph
c. by comparing its size to the sun
d. by comparing its color to the sun

Afigure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 20.9 12000 200 3.33

While the change in blank will remain the same during a collision, the force needed to bring an object to a stop can be blank if the time if collision is blank

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.