Question

Duncan takes a break from studying and goes to the gym to swim laps if swimming Burns 8.15 x 10 to the 5th power calories per hour how many kilojoules does swimming burn in that same amount of time

Answer 1

3411.427 kilojoules

8.15 x10^5 cal x (4.18 joules/ 1cal) x (1kJ/1000J) = 3,406.7 kJ

Answer 2

Answer: Duncan burns
`3409.96 kJ` in the same amount of time.

Step-by-step explanation:

We are given that Duncan burns
`8.15* 10^5` Calories per hour and we need to find the amount she burns in kilojoules.

For that we use the conversion factors:

`1Cal=4.184J\\\\1kJ=1000J`

Converting
`8.15* 10^5cal/hr` into kilojoules per hour, we get:

`\Rightarrow ((8.15* 10^5Cal)/(1hr))((4.184J)/(1Cal))((1kJ)/(1000J))\\\\\Rightarrow (3409.96kJ)/(hr)`

Hence, duncan burns
`3409.96 kJ` in the same amount of time.