What is temperature? a. a direct measure of external kinetic energy b. the same thing as heat energy c. an indirect measure of heat energy d. the amount of calories in a substance e. a direct measure of internal kinetic energy

Hello!

E.

Explanation:

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Temperature is a measure of the average kinetic energy of the particles in a substance. When the water is warmed, the particles of water move faster. The increases in movement of each particle increases the kinetic energy of each particle. The increase in the kinetic energy of each particle increases the average kinetic energy of the particles, which is observed as an increase in the temperature.

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-Charlie

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

there is none because earth is stationary and flat.