Answer:
The runner burnt 8.39×10^5 nutritional Calories
Explanation:
1 Calorie = 4.184J
The runner burns 3.5×10^3kJ (3.5×10^6J) = 3.5×10^6/4.184 Calories = 8.39×10^5 nutritional Calories
Answer: The runner burnt 14.625 cal.
Explanation: KiloJoule and Calories are two unit of energy.
To convert kJ in cal:
1kJ = 0.24Kcal
3.51.10³ kJ = x
x = [tex]\frac{3.51.10^{3} }{0.24}[/tex]
x = 14.625.10³ Kcal
However, it is asked for calories, not kilocalories. So, to find that it is only needed to divide the number by 1000 or multiply by [tex]10^{-3}[/tex]:
14.625.10³.[tex]10^{-3}[/tex] = 14.625 cal
The runner burn 14.625 nutritional calories.
