2. explain the relationship between the light reactions and the calvin cycle in photoautotrophs.

Explanation:

During photosynthesis, chlorophyll traps sunlight energy using photosystems (p680 and p700). This is converted into ATP and NADPH. The ATP supplies the energy needed for Calvin cycle while the NADPH gives the electrons need for conversion of carbon dioxide to sugar in calvin cycle.

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.

neither accurate nor precise.