Plz do all questions and the very bottom one as well

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An object has a weight of 500 on earth what is the mass of this object

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present