suppose you require 2600 food calories per day. a. what is your average power, in watts? b. how much energy…

suppose you require 2600 food calories per day. a. what is your average power, in watts? b. how much energy, in joules, do you require from food in a year? counting all forms of energy (such as gasoline, electricity, and energy for heating), the average person consumes about 400 billion joules of energy each year. compare this value to the energy needed from food alone. a. what is your average power, in watts? approximately 126 watts (round to the nearest whole number as needed.) b. the energy required from food is approximately billion joules per year. (round to the nearest tenth as needed.)

suppose you require 2600 food calories per day. a. what is your average power, in watts? b. how much energy, in joules, do you require from food in a year? counting all forms of energy (such as gasoline, electricity, and energy for heating), the average person consumes about 400 billion joules of energy each year. compare this value to the energy needed from food alone. a. what is your average power, in watts? approximately 126 watts (round to the nearest whole number as needed.) b. the energy required from food is approximately billion joules per year. (round to the nearest tenth as needed.)

Answer

Explanation:

Step1: Convert food - Calories to joules

1 food - Calorie = 4184 joules. So, 2600 food - Calories per day is $2600\times4184 = 1.08784\times10^{7}$ joules per day.

Step2: Calculate average power

Power $P=\frac{W}{t}$. There are $t = 24\times3600$ s in a day. So, $P=\frac{1.08784\times10^{7}}{24\times3600}\approx126$ W (already given).

Step3: Calculate annual food - energy

There are 365 days in a year. The energy $E$ from food in a year is $E = 1.08784\times10^{7}\times365=3.970616\times10^{9}$ joules. Convert to billion joules: $\frac{3.970616\times10^{9}}{10^{9}}\approx4.0$ billion joules.

Answer:

4.0