Answer:
In vector calculus, the curl is a vector operator that describes the infinitesimal rotation of a vector field in three-dimensional Euclidean space. At every point in the field, the curl of that point is represented by a vector. The attributes of this vector (length and direction) characterize the rotation at that point. The direction of the curl is the axis of rotation, as determined by the right-hand rule, and the magnitude of the curl is the magnitude of rotation. If the vector field represents the flow velocity of a moving fluid, then the curl is the circulation density of the fluid. A vector field whose curl is zero is called irrotational. The curl is a form of differentiation for vector fields. The corresponding form of the fundamental theorem of calculus is Stokes' theorem, which relates the surface integral of the curl of a vector field to the line integral of the vector field around the boundary curve.
The alternative terminology rotation or rotational and alternative notations rot F and ∇ × F are often used (the former especially in many European countries, the latter, using the del (or nabla) operator and the cross product, is more used in other countries) for curl F.
Unlike the gradient and divergence, curl does not generalize as simply to other dimensions; some generalizations are possible, but only in three dimensions is the geometrically defined curl of a vector field again a vector field. This is a phenomenon similar to the 3-dimensional cross product, and the connection is reflected in the notation ∇ × for the curl.
Explanation:
The answer to this question is B.) China and India. China has apporiximently 700,000,000 people and India has approximently 500,000,000 people. Making up for 36% of the worlds population.
Answer:
Below are considerations that will help you decide your intended path.
Explanation:
Trekking in and of itself entails danger, and it is much more dangerous to go out for trekking in such a mountainous region where only the latest issue of volcanic activity already occurred.
The various factors or measures should, however, be taken into account:
- Recognizing the map correctly along with notifications about the size of the region impacted by the volcanism. It is that the environment involved should be protected more.
- Take protective garments including suits that will avoid the lava fire. Then instead of going heading boots, you should be using trail walking boots.
- Have lots of water, because it takes tremendous energy to hit the tip. Then have products high-sugar to help you to grow.
- If something gets dark, maintain a headlamp with oneself. It will assist to capture moments, try to bring a camera.
- Carry a shield on you during the event that the volcanoes emit gases and therefore can cause breathing difficulties. Besides, one may carry a washcloth or perhaps a handkerchief close to the nose. There will always be a chance the air will fly wherein path it may switch every day.
- Seek to watch, whether there are any signals. Do not seek to search well beyond the scope of one. In several other phrases don't trespass a prohibited area otherwise you could be at risk of harm.
- Maintain someone's sensations in par with because this will support you listen to the certain noise as well as audio going to come from the outer reaches and therefore can help avoid any malfunctions.
- Unless the volcano remains alive, maintain the live volcanic explosives at a respectful location otherwise can cause great harm to you.
<span>218,134,692 people had internet access in 2009 which was 71% of the USA.
Hope this helps! </span>
<u>Answer:</u>
<em>Rigel and Betelgeuse </em>
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<u>Explanation:</u>
Rigel and Betelgeuse are counted in the brightest stars of the galaxy.
They form a pair in the Orion constellation.
The Rigel star is situated near the Equator. This star is invisible in the region around and above of latitude 82°N and can be seen from any part of the world. It is a blue white giant star. This makes Rigel helpful in navigation.
Betelgeuse is a red giant star which is visible from naked eye. It has the same diameter as that of Jupiter.
