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Step2247 [10]
3 years ago
14

Look at the table for energy used in activities. James goes walking for 1.5 hours a week and running for 0.5 hours. James has a

mass of 65kg. How much extra energy will he need a week in order to go running and walking?

Biology
1 answer:
Andreas93 [3]3 years ago
4 0

The <em>extra</em> energy needed by James in a week is 1950 joules.

Dimensionally speaking, the energy (E) , in joules, need by a person while doing an activity is defined by the following expression:

E = m\cdot t\cdot c (1)

Where:

  • m - Mass, in kilograms.
  • t - Time, in hours.
  • c - Energy index, in joules per kilogram-hour.

The <em>extra</em> energy needed by James is the sum of the energy spent both by running and walking:

E = 65\,kg \times \left(1.5\,h \times 10\,\frac{J}{kg\cdot h} +  0.5\,h \times 30\,\frac{J}{kg\cdot h} \right)

E = 1950\,J

The <em>extra</em> energy needed by James in a week is 1950 joules.

We kindly invite to check this question on energy: brainly.com/question/8118460

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