Question

A person uses 579 kcal of energy to run a race. Convert the energy used for the race of the following energy units: Calories, calories, Food Calories, Joules, and Kilojoules.( provide an answer in 4 significant figures)

Answer 1

Step-by-step explanation:

Here, we want to make conversions:

a) Calories

The kcal is the same as the big calories

Thus, we have it that:

`579\text{ kcal = 579 Calories}`

b) calories

What we have to do here is to multiply the kcal by 1000

Mathematically, we have that as:

`579\text{ kcal = 579 }*\text{ 1000 = 579,000 cal}`

c) Food Calories

1 kcal is the same as 1 food calories

Thus:

`579\text{ kcal = 579 food calories}`

d) Joules

Mathematically, 1 kcal = 4184 Joules

What we have to do here is to multiply the kcal value by 4184

That would be:

`\begin{gathered} 579\text{ }*\text{ 4184 = 2422536 J} \\ which\text{ is:} \\ 2423000\text{ J} \end{gathered}`

e) Kilojoules

What we have to do here is to divide the Joule value by 1000

Mathematically, we have that as:

`(2423000)/(1000)\text{ = 2423 KJ}`