The horizontal coordinates of a Frisbee in a strong wind are given by x=−12t + 4 t * t (x equals minus 12 t plus 4 t squared) and y=10 t − 3t * t, where x and y are in meters, and t is in seconds. What is the magnitude of the instantaneous velocity at t = 2 s, accurate to the nearest m/s?

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.

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