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 least penetrating form of radiation is

Students in an introductory physics lab are performing an experiment with a parallel-plate capacitor made of two circular aluminum plates, each 11 cm in diameter, separated by 1.0 cm. how much charge can be added to each of the plates before a spark jumps between the two plates? for such flat electrodes, assume that value of 3×106n/c of the field causes a spark.

22. the top of a cliff is located a distance h above the ground. at a distance h/2 there is a branch that juts out from the side of the cliff, and on this branch a bird's nest is located. two children throw stones at the nest with the same initial speed, one stone straight downward from the top of the cliff and the other stone straight upward from the ground. in the absence of air resistance, which stone hits the nest in the least amount of time?