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:
I say true. People would then have to look at the same things over and over agin with nothing new.
Answer:
I'm going with B kinetic energy from ocean currents
Answer:
Subduction zone and trench is formed
Explanation:
When two tectonic plates that are comprised of oceanic crust shares a convergent type of plate boundary, then the denser one subducts below the less dense one. Due to this convergent plate motion, a subduction zone is created, which is marked by the presence of an oceanic trench. As the subducting plate penetrates downward into the deeper zone, the process of partial melting takes place, which leads to the melting of the crust and eventually the constituent minerals are mixed with the magma. This magma again comes upward due to the force exerted by the convection current and thereby results in the formation of volcanoes in the over-riding plate.
Thus, the collision of two oceanic plates gives rise to the formation of a subduction zone and a trench.
