One way to find the mass of an object is to measure its acceleration when a force acts on it. If a tote of 80 N causes a box to accelerate at 0.1 m/s, what is the mass of the box?

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.