Aradioactive substance has a half-life of 10 years. if you start with 30 grams of the substance, how much will remain after 30 years.

What type of electromagnetic radiation has a shorter wavelength than blue light

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

How does a coronal mass ejection (cme) affect the solar wind? a cme adds more particles to the solar wind, intensifying it. a cme blocks the solar wind, causing it to fade. a cme does not affect the solar wind but it does affect auroras. a cme increases the amount of energy in the solar wind.