What's an example of a passive form of solar energy?

Solar energy is radiant light and heat from the Sun that is harnessed using a range of ever-evolving technologies such as solar heating, photo-voltaics, solar thermal energy, solar architecture, molten salt power plants and artificial photosynthesis.

It is an important source of renewable energy and its technologies are broadly characterized as either passive solar or active solar depending on how they capture and distribute solar energy or convert it into solar power. Active solar techniques include the use of photovoltaic systems, concentrated solar power and solar water heating to harness the energy. Passive solar techniques include orienting a building to the Sun, selecting materials with favorable thermal mass or light-dispersing properties, and designing spaces that naturally circulate air.

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In my opinion, the use of fossil fuel sources of energy will decrease in the near future. Meanwhile, other forms of clean energy will be cheaper and more available, like: solar, wind and hydroelectric energy.

The solar cells do not store energy, but there may be a battery in the calculator that stores energy. Normally, there is enough light in an indoor room to operate the calculator. I have never had to use the sun with a solar calculator;)

Good luck.

Paul

photosynthesis

biomass, solar, nuclear, wind, passive heating & cooling, geothermal.

resources:
Alternatives to Fossil Fuels Science Articles PlanetSEED

The definitive answer is: it depends. It depends on how the cell "died". Most forms of cell death include getting holes in the membrane, and if that happens any type of transport (active or passive) is pretty much impossible. The transport proteins might still be working, but whatever they're moving across the membrane would just leak back through the holes, so there's no transport. If there aren't holes in the membrane, then passive transport should still work. For active transport, it depends again. Usually for active transport you just need the transporter and an energy source (like ATP). As long as the energy source is still around, active transport will still go on. Chances are, though, that the dead cell isn't making more ATP as the old is used up, so pretty soon it will run out and active transport will stop. Other forms of active transport don't use ATP directly, but they still count on the cell using energy. When the cell dies, those transporters will also stop working before long.

Alternative energy generally a form or forms of energy that are not based on fossil fuels but are either renewable or sustainable without depleting a finite resource. Examples of alternative energy are Biofuel; Geothermal Energy; Solar Energy; Tidal Energy; and Wind Energy.