What is the definition of luminosity

Which units can be used to measure length or distance? check all that apply. gram meter kilometer liter inch

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt