A car travels 500 km at an average speed of 120 m/s. How long will the trip take in hours?

Explanation:

120 m/s × (1 km / 1000 m) × (3600 s / hr) = 432 km/hr

t = (500 km) / (432 km/hr) = 1.16 hr

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.

what is the actual question though?