Bill Nye help.. I didn’t get link to vid, hoping y’all have seen it. 20 POINTS!

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.

If the textbook weighs 19.6 newtons on venus,what is the strength of gravity on venus?

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?