Deep-diving submarines have helped scientists learn that photosynthesis does not take place in the deeper parts of the ocean. Which of the following explains why photosynthesis does not occur very deep in the ocean? a. There is no oxygen.
b. There is no glucose.
There is no sunlight.
c. There is no sunlight.
d. There is no nitrogen.

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

Calculate the ratio of h+ ions to oh– ions at a ph = 6. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 6. are they the same? why or why not? record your explanation in table a. what is the concentration of h+ ions at a ph = 6? mol/l what is the concentration of oh– ions at a ph = 6? mol/l what is the ratio of h+ ions to oh– ions at a ph = 6? : 1

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?