Question

A single serving bag of snack chips contains 69.0 Cal. Assuming that all of the energy from eating these chips goes toward keeping your heart beating, how many hours can these chips sustain a heartbeat of 74 beats per minute?
Note: 1 Cal = 1 kcal = 4.184 kJ and each heartbeat requires approximately 1 J of energy.

Answer 1

Answer: For about 49.09 hours given chips sustain a heartbeat of 74 beats per minute.

Explanation:

The given data is as follows.

          E = 69.0 cal

         1 hear beat = 1 J energy

Therefore, energy of 69 calories will be calculated as as follows.

         $65 calories \times 4.184 kJ/cal$

         = 271.96 kJ

or,     = 271960 J       (as 1 kJ = 1000 J)

This also means that 271960 heart beats rate is 74 beats per minute.

So,       $\frac{217960}{74}$

            = 2945.41 minute

AS there are 60 minutes present in an hour. Therefore, we will convert minutes into hours as follows.

               $\frac{2945.41}{60}$

              = 49.09 hours

Thus, we can conclude that for about 49.09 hours given chips sustain a heartbeat of 74 beats per minute.