George Peacock: Difference between revisions

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The health needs of the child need to be considered carefully. Growing children need a significant amount of vitality consumption to help them to grow, yet, just as with adults, when stamina intake surpasses energy usage, the child usually place on fat.<br><br>The BMI of the individual is calculated by dividing his/her fat (pounds) by the square of his/her height (inches) plus multiplying with 703. This index indicates if a person is underweight, normal, overweight or overweight. After is a standard [http://safedietplansforwomen.com/bmi-chart bmi chart] for adults.<br><br>37. Making time for yourself: Running = sanity. Alone or with neighbors it has fantastic healing results which last all day bmi chart men. I find doing it early each morning is ideal as I learn I'll get my run inside and "life stuff" during the day will likely not get in the way.<br><br>Lets state an adult male is 60 and weighs 200 pounds. According for this chart, his BMI would be 27.1, which puts him into the obese category. If he loses 17 pounds, the same guy, now at 183 pounds, would have a BMI of 24.8, which would place him inside the normal fat category.<br><br>The perfect fat for women of a medium frame measuring 64-67 inches is between 124-147 pounds. This leads to a lot of difference inside what will be considered an ideal fat. Women could be accorded for each inch over 5 feet (1.52 m). So a female that is 52 (1.57m) has an perfect fat of 110 pounds (49.89 kg).<br><br>Dont do anything extreme whenever you are struggling bmi chart women to remove fat. Eat sensibly, omitting 500 calories a day for a fat loss of 1 pound per week. Exercise, slowly adding more repetitions for much faster fat reduction. We is doing the heart a favor.<br><br>In addition, men generally have more muscle than women plus females have more fat in their body than men. For this reason, women must have their fat plus height ratio calculated from a BMI calculator for women.<br><br>What in the event you have eighty pounds to lose to move the BMI into a healthy range? Don't be discouraged. Remember which a goal is for weight loss you are able to maintain for a lengthy time. In the race between the tortoise plus the hare, the tortoise won. The consequences of being the hare, which is, finding a quick-fix crash diet, usually ultimately place you further behind inside the race. Think of the benefits of the objective described above. First, losing 10 percent of your body weight and keeping it off can assist you feel greater and will decrease a few of the wellness dangers associated with being overweight. Second, you'll have learned life-style behaviors which might become habit, and the upcoming milestone won't appear as difficult to reach.
{{Distinguish|Escape velocity}}
The '''orbital speed''' of a body, generally a [[planet]], a [[natural satellite]], an [[satellite|artificial satellite]], or a [[multiple star]], is the speed at which it [[orbit]]s around the [[Barycentric coordinates (astronomy)|barycenter]] of a system, usually around a more [[mass]]ive body.
It can be used to refer to either the mean orbital speed, i.e. the average speed as it completes an orbit, or the speed at a particular point in its orbit.{{citation needed (lead)|date=December 2011}}
 
The orbital speed at any position in the orbit can be computed from the distance to the central body at that position, and the [[specific orbital energy]], which is independent of position: the [[kinetic energy]] is the total energy minus the [[potential energy]].
 
==Radial trajectories==
 
In the case of radial motion:{{Citation needed|date=March 2013}}
* If the [[specific orbital energy]] is positive, the body's kinetic energy is greater than its potential energy: The orbit is thus open, following a [[hyperbola]] with [[focus (geometry)|focus]] at the other body. See [[radial hyperbolic trajectory]]
* For the zero-energy case, the body's kinetic energy is exactly equal to its potential energy: the orbit is thus a [[parabola]] with [[focus (geometry)|focus]] at the other body. See [[radial parabolic trajectory]].
* If the energy is negative, the body's potential energy is greater than its kinetic energy: The orbit is thus closed. The motion is on an [[ellipse]] with one [[focus (geometry)|focus]] at the other body. See [[radial elliptic trajectory]], [[free-fall time]].
 
==Transverse orbital speed==
 
The transverse orbital speed is inversely proportional to the distance to the central body because of the law of conservation of [[angular momentum]], or equivalently,  [[Johannes Kepler|Kepler]]'s [[Kepler's laws of planetary motion|second law]]. This states that as a body moves around its orbit during a fixed amount of time, the line from the barycenter to the body sweeps a constant area of the orbital plane, regardless of which part of its orbit the body traces during that period of time. This law is usually stated as "equal areas in equal time."{{Citation needed|date=March 2013}}
 
This law implies that the body moves faster near its [[periapsis]] than near its [[apoapsis]], because at the smaller distance it needs to trace a greater arc to cover the same area.
 
==Mean orbital speed==
 
For '''orbits with small [[eccentricity (orbit)|eccentricity]]''', the length of the orbit
is close to that of a circular one, and the mean orbital speed can be approximated either from observations of the [[orbital period]] and the [[semimajor axis]] of its orbit, or from knowledge of the [[mass]]es of the two bodies and the semimajor axis.{{Citation needed|date=March 2013}}
 
:<math>v_o \approx {2 \pi a \over T}</math>
 
:<math>v_o \approx \sqrt{\mu \over a}</math>
 
where <math>v_o\,\!</math> is the orbital velocity, <math>a\,\!</math> is the [[length]] of the [[semimajor axis]], <math>T\,\!</math> is the orbital period, and <math>\mu\,\!</math> is the [[standard gravitational parameter]]. Note that this is only an approximation that holds true when the orbiting body is of considerably lesser mass than the central one, and eccentricity is close to zero.
 
'''Taking into account the mass of the orbiting body''',
 
:<math>v_o \approx \sqrt{(m_2)^2 G \over (m_1 + m_2) r}</math>
 
where <math>m_1\,\!</math> is now the mass of the body under consideration, <math>m_2\,\!</math> is the mass of the body being orbited, <math>r\,\!</math> is specifically the distance between the two bodies (which is the sum of the distances from each to the center of mass), and <math>G\,\!</math> is the [[gravitational constant]]. This is still a simplified version; it doesn't allow for [[ellipse|elliptical]] orbits, but it does at least allow for bodies of similar masses.
 
When one of the masses is almost negligible compared to the other mass as the case for [[Earth]] and [[Sun]], one can approximate the previous formula to get:
 
:<math>v_o \approx \sqrt{\frac{GM}{r}}</math>
 
or assuming r equal to the body's radius
 
:<math>v_o \approx \frac{v_e}{\sqrt{2}}</math>
 
Where ''M'' is the (greater) mass around which this negligible mass or body is orbiting, and ''v<sub>e</sub>'' is the [[escape velocity]].
 
For an '''object in an eccentric orbit''' orbiting a much larger body, the length of the orbit decreases with eccentricity <math>e\,\!</math>, and is an [[ellipse#Circumference|ellipse]].
This can be used to obtain a more accurate estimate of the average orbital speed:
:<math> v_o = \frac{2\pi a}{T}\left[1-\frac{1}{4}e^2-\frac{3}{64}e^4 -\frac{5}{256}e^6 -\frac{175}{16384}e^8 - \dots \right] </math><ref>{{cite book
| author=Horst Stöcker, John W. Harris | year=1998
| title=Handbook of Mathematics and Computational Science
| pages=386 | publisher=Springer
| isbn=0-387-94746-9 }}</ref>
 
The mean orbital speed decreases with eccentricity.
 
{{earth orbits}}
 
==See also==
*[[Escape velocity]]
*[[Delta-v budget]]
*[[Hohmann transfer orbit]]
*[[Bi-elliptic transfer]]
 
==References==
{{Reflist}}
 
{{Orbits}}
 
[[Category:Orbits]]
 
[[hu:Kozmikus sebességek#Szökési sebességek]]

Latest revision as of 15:57, 22 November 2014

The health needs of the child need to be considered carefully. Growing children need a significant amount of vitality consumption to help them to grow, yet, just as with adults, when stamina intake surpasses energy usage, the child usually place on fat.

The BMI of the individual is calculated by dividing his/her fat (pounds) by the square of his/her height (inches) plus multiplying with 703. This index indicates if a person is underweight, normal, overweight or overweight. After is a standard bmi chart for adults.

37. Making time for yourself: Running = sanity. Alone or with neighbors it has fantastic healing results which last all day bmi chart men. I find doing it early each morning is ideal as I learn I'll get my run inside and "life stuff" during the day will likely not get in the way.

Lets state an adult male is 60 and weighs 200 pounds. According for this chart, his BMI would be 27.1, which puts him into the obese category. If he loses 17 pounds, the same guy, now at 183 pounds, would have a BMI of 24.8, which would place him inside the normal fat category.

The perfect fat for women of a medium frame measuring 64-67 inches is between 124-147 pounds. This leads to a lot of difference inside what will be considered an ideal fat. Women could be accorded for each inch over 5 feet (1.52 m). So a female that is 52 (1.57m) has an perfect fat of 110 pounds (49.89 kg).

Dont do anything extreme whenever you are struggling bmi chart women to remove fat. Eat sensibly, omitting 500 calories a day for a fat loss of 1 pound per week. Exercise, slowly adding more repetitions for much faster fat reduction. We is doing the heart a favor.

In addition, men generally have more muscle than women plus females have more fat in their body than men. For this reason, women must have their fat plus height ratio calculated from a BMI calculator for women.

What in the event you have eighty pounds to lose to move the BMI into a healthy range? Don't be discouraged. Remember which a goal is for weight loss you are able to maintain for a lengthy time. In the race between the tortoise plus the hare, the tortoise won. The consequences of being the hare, which is, finding a quick-fix crash diet, usually ultimately place you further behind inside the race. Think of the benefits of the objective described above. First, losing 10 percent of your body weight and keeping it off can assist you feel greater and will decrease a few of the wellness dangers associated with being overweight. Second, you'll have learned life-style behaviors which might become habit, and the upcoming milestone won't appear as difficult to reach.

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