What type of matter is 10 grams of calcium?

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How have the competing explanations' experiments on atoms affected the development of the atomic model?

Aballet student who learns with the of his instructor is demonstrating learning.

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.