The process of star and planet formation begins with a large cloud of gas and dust called a solar nebula. rank the formation events that occur within a cloud from earliest to latest.

rank from earliest to latest. to rank items as equivalent, overlap them.

the cloud is large, cool, and slowly rotating

the cloud collapses into a disk

competing rotational and gravitational forces begin to flatten the cloud

the cloud becomes denser, heats up, and rotates faster

the cloud starts to contract under the influence of gravity

Imagine you work as a consultant, and your daily job involves listening to the constructive criticism of others. as part of your job, you must listen to opposing viewpoints to make important decisions. in this activity, you are a consulting dam engineer. you must make a decision about four different dams; should they be repaired, taken down, or left alone? you will listen to contrasting opinions about what should be done with the dams before you make the final decision. as the consulting dam engineer, what do you decide to do with this dam? explain your reasoning. by making your decision, did you support the opinions of the mayor and/or the dam safety official? why or why not? (site 1)

What is the electric force acting between two charges of -0.0045 c and -0.0025 c that are 0.0060 m apart? use fe=kq1q2/r^2 and k = 9.00 x 10^9 n*m^2/c^2 a. 1.7 x 10^7 n b. -1.7 x 10^7 n c. -2.8 x 10^9 n d. 2.8 x 10^9 n

What are similarities and differences between refraction, reflection, diffraction and absorption?