The food calorie, equal to 4186 j, is a measure of how much energy is released when the body metabolizes food. a certain fruit­and­cereal bar contains 140 food calories. (a) if a 65­kg hiker eats one bar, how high a mountain must he climb to "work off" the calories, assuming that all the food energy goes into increasing gravitational potential energy? (b) if, as is typical, only 20% of the food calories go into mechani- cal energy, what would be the answer to part (a)? (note: in this and all other problems, we are assuming that 100% of the food calories that are eaten are absorbed and used by the body. this is actually not true. aperson's "metabolic efficiency" is the percentage of calories eatenthat are actually used; the rest are eliminated by the body. metabolic efficiency varies considerably from person toperson.)

Our variables

A bar contains 140 calories.

A) When you eat a bar you gain

calories.

To climbing we use the equation of Potential Energy, that is,

That should be the equal energy gain when you eat a fruit&cereal bar

Therefore from,

We use the equation of Potential Energy to find the high.

B. Only 20% of food energy is available.

Then,

Then, Height,

nec chapter 5 contains

c. information on special occupancy areas

nec chapter 6 covers

a. special equipment

which of the following rules contain the words shall or shall not and must be adhered to?

b. mandatory rules

which of the following rules identify actions that are allowed but not required and typically cover options or alternative methods?

c. optional rules

which of the following serves as the introduction to the nec and provides an overview of the book?

a. nec article 90

organizations that test products for safety are

c. nrtls

the nec is published by the

a national fire protection association

the nec is divided into

b. 9 chapters

the nec provides informative annexes for

c. informational materials and examples

two terms from nec article 100 that trainees should become familiar with are

b. labeled and listed

explanation: