Dark areas on the surface of the sun that exhibit intense magnetic activity are
a)sunspots
b)solar flares
c)corona

The intensity, or loudness, of a sound can be measured in decibels (db), according to the equation , where i is the intensity of a given sound and is the threshold of hearing intensity. what is the intensity, in decibels, [i(db)], when ? use a calculator. round to the nearest whole number. 8 9 19 80

What is hidden during a lunar eclipse? isn't the moon hidden?

Ascientist is tracking an object orbiting the sun that is found between mars and jupiter. in order to classify the object as an asteroid, it must be at least