Astronomers use the celestial sphere as a model to track the position of stars. However, the celestial sphere does not accurately describe the movement of stars in the galaxy. Why do scientists use the celestial sphere if they know it is inaccurate?

A

Models can be inaccurate if they are useful.

B

Scientists have not had time to develop a new model.

C

The stars move too fast to map them any other way.

If a textbook weighs 37.2 n on venus, and the book has a mass of 4.4 kg, what is the strength of gravity on venus? 8.9 m/s28.9 m/si don't have enough information,9.8 m/s2

Explain vector addition, triangle method and parallelogram method

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.