Describe how a photovoltaic cell (solar cell) converts light energy to electrical energy.
What will be an ideal response?
Light energy can be converted directly to electrical energy by light striking a photosensitive (light-sensitive) substance in a photovoltaic cell (solar cell). A solar cell consists of photosensitive materials mounted between metal contacts. When the surface of the photosensitive material is exposed to light, it dislodges electrons from their orbits around the surface atoms of the material. This occurs because light has energy. A single cell can produce a small voltage.
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If a = 7, b = 5, and c = 4, find the value of 3a + c2 + 2b.
A. 37 B. 47 C. 40 D. 195
Why are rooting hormones used on some plant cuttings?
What will be an ideal response?
The _________________________ provides the surfacing for the outdoor room
Fill in the blank(s) with correct word
Which of the following is a mother breed of swine?
a. Duroc c. Landrace b. Hampshire d. Santa Gertrudis