35) When does a protostar become a true star?

32) The most abundant molecule in cold interstellar molecular clouds, out of which stars may form, is

We will post a short question to Canvas after Thursday’s guest lecture with Amanda Zweerink. You don’t need to answer anything here—once you’ve submitted your response on Canvas, your points will be added for this question.

Target wants to increase adoption of its new same-day delivery service, but it’s having trouble gaining traction with more cautious shoppers. Based on what you know about the five adoption factors (like compatibility, trialability, and observability), name one factor Target should focus on to reach the early majority. Explain why that factor would matter to early majority shoppers in this case.

20) Where is a star located on the Hertzsprung-Russell diagram if it is burning hydrogen into helium in its core?

Using similar triangles and proportions (do NOT use a formula), find x in the diagram.  To get full credit you must write the triangle similarity statement that relates the three triangles. Click ‘True’ when finished.

The following results were obtained for the below reaction in experiments designed for the study of the rate of the reaction.  (12 pts) A + B=> 2C Experiment Initial concentrations  mol/L    [A]                                          [B] Rate of disappearance of  A (M/sec) 1 0.030 0.030 2.0×10-3 2 0.030 0.060 4.0×10-3 4 0.060 0.030 4.0×10-3 Determine the order of the reaction with respect to A. (3pts) Determine the order of the reaction with respect to B. (3pts) Calculate the value of the rate constant, k for the reaction. Include units. (1pt) Write the differential rate law for this reaction. (1pt) What will be the initial rate of disappearance of A, if an experiment is attempted with A and B both equal to 0.060M?(1pt) Write the integrated rate law for the concentration of A (1pt ) Calculate the half-life for  A (1pt) Calculate the concentration of A in experiment 2 after 60 seconds (1 pt) To receive full credit, report your answers below and submit a picture of your work to the Exam 4 Solutions, Extra Credit and Partial Credit assignment AFTER SUBMITTING COMPLETED Midterm. Answers:

41) What happens to the core of a star after a planetary nebula occurs?

11) The main-sequence turnoff point of a star cluster tells us the cluster’s

6) Parallel light beams only remain parallel to each other in a space-time with _________ geometry.