The phrase "a certain height at a" is not complete and lacks clarity, making it difficult to determine its correctness in written English.
It could be used in contexts discussing measurements or specifications, but it requires additional information to convey a clear meaning.
Example: "The structure must be built to withstand winds at a certain height at a given elevation."
Alternatives: "a specific height at" or "a defined height at".
They get stuck: at a certain height, in a certain mindset, in what they wear, listen to, and in what they read.
A single Dallas Cowboys football game uses up as much electricity as the entire nation of Liberia in those same three hours -- one reason the globe, if looked at from a certain height, is a cluster of lights surrounded by enormous patches of dark.
Such a curvature is manifested, for example, by the tidal force of the Earth's gravitational field that occasions two freely falling bodies, released at a certain height and at fixed separation, to approach one another.
The paper [1] suggests to imagine a child, which begins to grow more rapidly at the age of about 12 years, growing more and more rapidly until a certain height is approached, at which time there is a rapid slowing of the growth, stopping at the adult height dictated by genes.
We consider a physical set-up, in a Cartesian coordinate system where x = north, y = east, and z = down, consisting of a line current j x, ��) = Jδ(x − x o) running east west at a certain height h above the Earth's surface at a given surface position x o in kilometres along a geomagnetic meridian from the geomagnetic north pole.
The location of zero wind speed in the vertical wind profile, which is defined as the aerodynamic roughness length ({text{Z}}_{0}) (Prigent et al. 2005), is not at the land surface but at a certain height above the surface.
The overlying zone can be considered an "annular-shaped fractured zone", which is located at a certain height above the goaf and has a particular width and extends upward at a particular angle.
However, we observed, at zones of the stem disc with a highly reticulate transport system, that some vessels were part of a certain wood patch at a certain height of the tree but were part of wood volumes that were non-existing at this height, only a few hundred micrometers higher in the tree.
"NEW YORK reveals itself only at a certain height, a certain distance, a certain speed!" Jean-Paul Sartre wrote a half-century ago, before the city grew even higher.
My physical science teacher had a thing for weird experiments as making bubbles or building a carrier to safety drop an egg at a certain height.
