1. Hydroelectric power can come from energy carried by ocean waves, tides, salinity, and ocean temperature differences. This energy can be harnessed to generate electricity. Figure 1—Tidal Turbine (attached below)

a. Reference Figure 1 to answer the following:

i. Explain how tidal turbines can create electrical energy to power homes.

ii. Describe one effect the tidal turbine may have on the ocean environment.

iii. Describe one possible impact tidal turbines can have on the biodiversity of ecosystems.

i. Propose a strategy to avoid the impact described in (iii). Justify your solution by explaining a potential advantage.

b. Ocean energy has the potential of providing a large amount of renewable energy around the world. Explain the advantage of using this renewable energy source over other renewable energy options.

c. Globally, an estimated 1,800 TWh of tidal energy exists per year. There are several tidal power plants around the world, including large ones in South Korea, France, and Canada. The largest tidal plant produces 0.5 TWh/year, which can power 46,000 homes annually.

i. Calculate the number of homes that can be powered by 50 TWh of energy.

ii. Calculate the number of tidal plants needed to power 92,000 homes annually.

all freedom fighters demanded for constitution. so british finally granted india it's freedom. then a constituent assembly was formed. it's chair man was rajendra prasad and its deputy chairman was dr. br ambedkar.

this assembly take the time of about one year than our constitution was finally formed.

explanation:

question - in 1827, john walker, a druggist in a small english town, tipped a splint with sulphur, chlorate of potash, and sulphid of antimony, and rubbed it on sandpaper, and it burst into flame. the druggist had discovered the first friction-chemical match, the kind we use to-day. it is called friction-chemical because it is made by mixing certain chemicals together and rubbing them. although walker's match did not require the bottle of acid, nevertheless it was not a good one. it could be lighted only by hard rubbing, and it sputtered and threw fire in all directions. in a few years, however, phosphorus was substituted on the tip for antimony, and the change worked wonders. the match could now be lighted with very little rubbing, and it was no longer necessary to have sandpaper upon which to rub it. it would ignite when rubbed on any dry surface, and there was no longer any sputtering. this was the phosphorus match, the match with which we are so familiar. according the paragraph what was the benefit of the new phosphorus match? it burst into flame when rubbed on sandpaper. it was made by mixing chemicals. it could be ignited on any dry surface. it threw fire in all directions.

answer - matches required natural chemicals

the vibration from the sound waves messed with the glass and it shattered.

hope this .