Li ming thinks that chlorophyll is a reactant of photosynthesis, but her classmate julian disagrees. who is correct, and why? a)li ming is correct because chlorophyll is a substance that is present before the chemical reaction of photosynthesis takes place. b)li ming is correct because chlorophyll is a substance that is formed from the chemical reaction of photosynthesis. c)julian is correct because chlorophyll is a product, not a reactant, of photosynthesis. d)julian is correct because chlorophyll is neither used up nor formed in the chemical reaction of photosynthesis.

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 740 n/m. it is initially at rest on an inclined plane that is at an angle of theta= 26 with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is uk = 0.17. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. the block's initial mechanical energy is 9.472 j.b. if the spring pushes the block up the incline, what distance l in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.