Answer:
Electrolytic manganese dioxide (EMD) is used in zinc-carbon batteries together with zinc chloride and ammonium chloride. EMD is commonly used in zinc manganese dioxide rechargeable alkaline (Zn RAM) cells also. For these applications, purity is extremely important.
Explanation:
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Astronomers learn about the internal structure and evolution of stars by using spectroscopy and observing their luminosity.
New stars form in nebulae, interstellar gases and dust clouds leftover from supernovas.
Supernovas are the results of stars running out of its nuclear fuels.
The lifespan of a massive star is shorter than a star like the Sun because massive stars have very high pressures and temperatures at their cores and therefore burn their nuclear fuels faster. Stars grow larger as they age.
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After all the ice melts the temperature of water inside the beaker starts rising. As the temperature of water inside beaker is less than temperature of surrounding.So heat transfer from surrounding to water inside beaker because we heat transfer from high temperature to low temperature.