Why openness is important to the progress of science?

If you want to create an electrical current, which situation would produce a solution capable of this

Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.

What is the molecular weight of copper