# How to use *Tangent-plane* in a sentence

This mass is equal to 47rabcp,u; therefore Q = A47rabcp s and b =pp, where p is the length of the perpendicular let fall from the centre of the ellipsoid on the

**tangent plane**.It may be defined as a section of a right circular cone by a plane parallel to a

**tangent plane**to the cone, or as the locus of a point which moves .so that its distances from a fixed point and a fixed line are equal.Now consider the

**tangent plane**w at any point P of a confocal, the**tangent plane**fii at an adjacent point N, and a plane of through P parallel to of.The axis of resultant angular momentum is therefore normal to the

**tangent plane**at J, and does not coincide with OJ unless the latter be a principal axis.Since w varies as p, it follows that OH is constant, and the

**tangent plane**at J is therefore fixed in space.AdvertisementIf four fluids, a, b, c, d, meet in a point 0, and if a tetrahedron AB CD is formed so that its edge AB represents the tension of the surface of contact of the liquids a and b, BC that of b and c, and so on; then if we place this tetrahedron so that the face ABC is normal to the tangent at 0 to the line of concourse of the fluids abc, and turn it so that the edge AB is normal to the

**tangent plane**at 0 to the surface of contact of the fluids a and b, then the other three faces of the tetrahedron will be normal to the tangents at 0 to the other three lines of concourse of the liquids, an the other five edges of the tetrahedron will be normal to the tangent planes at 0 to the other five surfaces of contact.If K is the height of the flat surface of the drop, and k that of the point where its

**tangent plane**is vertical, then T = 1(K - k) 2gp. Quincke finds that for several series of substances the surfacetension is nearly proportional to the density, so that if we call Surface-Tensions of Liquids at their Point of Solidification.Considered as a curved surface, concentric with the earth, a

**tangent plane**to such a surface is the plane of the horizon.