'effect weakens' is correct and usable in written English.
You can use it to draw attention to the reduction of an effect. For example, "As time passes, the effect of the virus weakens."
This racial effect "weakens the political effectiveness of Latinos as a group," said Gary M. Segura, a political science professor at Stanford who has conducted some of the research.
Calcium is needed for muscle contraction and this "leaking" effect weakens the contractions and is a causal factor in muscle fatigue.
When the interface elasticity parameter is positive, the interface effect weakens the piezoelectric effect in the material by decreasing the value of the piezoelectric potential and vice versa.
But the embarrassing moments are piling up, and some veteran Republicans are beginning to wonder whether the cumulative effect weakens the party brand, especially in foreign policy and national security, where Republicans have typically dominated Democrats.
At the equator, your weight is reduced (compared to a non-spinning Earth) by about 0.3%; the effect weakens as you go north or south, and once you reach the north or south pole it disappears completely because the Earth is not spinning there.
The crystal expansion stress initiated by the fatigue load and freeze-thaw coupling effect weakens the ability to disperse internal stress, leading to the pore structure parameters showing a tendency of monotonous rapid deterioration after the turning point, and the concrete reveals fatigue failure with larger porosity and SDC compared to that of a single field.
TfL's own statistics do not show any sign of the deterrent effect weakening.
First, the United States must, in effect, weaken the dollar by 10 to 20 percent.
This superior firm performance was strongest for second-generation CEOs, and the effect weakened with each later generation.
This crass political manipulation will have the opposite effect, weakening Russia in the eyes of the world and eventually its own citizens.
Meanwhile, with the enhancement of chloride concentrations, the corrosion rates generally increased but the accelerating effect weakened as the exposure time prolonged.
