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3 years ago

Approximately how many calories should a person who weighs 160 pounds consume per day

2 answers:

8 0

Until the age of 3 or 4 or 5, you can relate a person's weight to the
amount of energy he needs to take in every day. After that, you can't.
It starts to depend on a lot of other things, besides just body weight.

Here's a silly way to think about this:

Let's say we have two people.

-- One person is 30 years old, height 5-ft 8-in, weight 160 pounds.
Employed as a mail carrier, walks a 7-mile route every day.

-- The second person is 9 years old, height 4-ft 6-in, weight 160 pounds.
Enrolled in the 4th Grade. Rides the bus to and from school.
After dinner and homework, watches TV, plays video games, or surfs the web.

Both of these people weigh 160 -pounds.
Do you think they should both get the same number of daily calories ?

vichka [17]3 years ago

3 0

1130 calories about

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How would a spinning disk's kinetic energy change if its moment of inertia was five times larger but its angular speed was five

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Answer:

The kinetic energy of a spinning disk will be reduced to a tenth of its initial kinetic energy if its moment of inertia is made five times larger, but its angular speed is made five times smaller.

Explanation:

Let us first consider the initial characteristics of the angular motion of the disk

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For the second case, we consider the characteristics to now be

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Recall that the kinetic energy of a spinning body is given as

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$KE = \frac{1}{2}Iw^{2}$

and for the second case, the K.E. is given as

$KE = \frac{1}{2}(5I)(\frac{w}{5} )^{2} = \frac{5}{50}Iw^{2}$

$KE = \frac{1}{10}Iw^{2}$

this is one-tenth the kinetic energy before its spinning characteristics were changed.

This implies that the kinetic energy of the spinning disk will be reduced to a tenth of its initial kinetic energy if its moment of inertia is made five times larger, but its angular speed is made five times smaller.

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