What was the acceleration during the segment labeled "a"?

Explanation:

As we know that the acceleration of an object is defined as the rate of change in velocity of the object

so we can say it is given as

so if we have a graph of velocity and time then rate of change in velocity is given by the slope of v-t graph

so here for segment A slope of the graph is

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.

a and c

c is 100% but i am confused in a