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xxTIMURxx [149]
3 years ago
8

Which of these is a conversion from chemical energy to mechanical energy?

Chemistry
1 answer:
Natasha_Volkova [10]3 years ago
7 0

Answer:

C . A person lifting a weight

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During a phase change energy my be added or subtracted from a system, but the temperature will not change. The temperature will change only when the phase change has completed. No temperature change occurs from heat transfer if ice melts and becomes liquid water (i.e., during a phase change). For example, consider water dripping from icicles melting on a roof warmed by the Sun. Conversely, water freezes in an ice tray cooled by lower-temperature surroundings. Energy is required to melt a solid because the cohesive bonds between the molecules in the solid must be broken apart so that the molecules can move around at comparable kinetic energies; thus, there is no rise in temperature.
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Identify the statement that correctly describes light and how it travels? (2 points)
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3 years ago
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The correct answer is option C, 5.02 x 10²² carbon atoms

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According to Avogadro, 1 mole of C has 6.023 x 10²³C atoms

Now 1 mole of C is equal to 12 g

Therefore, 12 g of C = 6.023 x 10²³ C atoms

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3 years ago
The first method of determining the chemical composition of substances in space was to
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Answer:

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Explanation:

The average kinetic energy of the rice molecules increases as the pot is left on the cooking stove.

Heat is transferred to the pot by conduction from the heat source. The heat is then transferred to the rice in the cooking pot by convection.

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