The measurement 0.000043 m, expressed correctly using scientific notation, is

43 ÷10^6

Explanation:

if we divide any decimals with 10 then we just have to move the decimal from left to right with respect to the power

explanation:

newton's third law, for every action there is an equal and opposite reaction.

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.