Evaluate the indefinite integral:∫2x tan200(x2) sec4x2dx{“version”:”1.1″,”math”:”∫2x tan200(x2) sec4x2dx”}

What triggers the collapse of interstellar clouds to form stars? A density increase in a region of the cloud initiates the attraction of more material in the region by means of

As the nebula or the molecular cloud contracts due to gravity

The solar sunspot activity occurs in cycles of

Our Sun is expected to remain on the main sequence for

The temperature of the visible surface of our Sun is

A star when observed through a powerful telescope has a Stellar Parallax of 0.25 arcsecs. What is the distance to the star?

The more massive a main sequence star is

The more massive the star on the main sequence is

Which of the following would not result from a C. difficile infection?