The components of vector a are ax = +2.2 and ay = -6.9 , and the components of vector b are given are bx =
-6.1 and by = -2.2. what is the magnitude of the vector b - a

Explanation:

As we know that

so we have

Also we know that

so we will have

now we need to find magnitude of B - A

so we have

magnitude of this vector is given as

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.

do you have a formula possibly