A 128 gram Radium-226 sample with a half-life of 2.25 billion years is found. How many grams will remain after two half-lives?

If the new moon happens on january 15th, what shape will it be on february 6th?

Astep up transformer has 250 turns on its primary and 500 turns on it secondary. when the primary is connected to a 200 v and the secondary is connected to a floodlight that draws 5a, what is the power output? show all of your work.

When flexing to a reflective style, one should be specific, brief and to the point, and maintain a fast and decisive pace?