1. On the sheet provided, place your tacks in the foci labeled 2 then use your string and pencil to draw an ellipse. Label your ellipse #2. This will represent the eccentricity of Comet and Perez. Measure the distance
between foci and the major axis to the nearest tenth of a centimeter. When you are finished, calculate
the eccentricity for this ellipse to the nearest thousands in the space below.
#2 Eccentricity= Distance between foci =
Length of major axis
to the nearest tenth of a centimeter when you are finished, calculate the eccentricity for this eclipse to the nearest thousands in the space below

i just learnt this recently but i need to look through my notes again

  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-

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

: )