The phrase "a experiment which" is not correct in written English.
It should be "an experiment which" because "experiment" begins with a vowel sound.
Example: "I conducted an experiment which tested the effects of light on plant growth."
Alternatives: "a study that" or "an analysis which".
Inspired by a Shanghai businessman, Stuart Jeffries attempted to live on just £10 a week – an experiment which involved drinking old Schnapps and stealing food from children.
That was when Dmitry Belyaev, a geneticist, began an experiment which continues to this day.
"Everybody knew in the prison study that it was an experiment, which is a formal game.
But the architects are treating it as an experiment which provides a proof of concept and proof of the unbound limits of 3D printing.
The props, inspired by an experiment which created a cell with completely synthetic DNA, are all based on similarly functioning bacteria that exist in nature.
In a recent article for Wired, Jonah Lehrer describes an experiment which shows the value of a mental break.
We assist in this period at an experiment which leads to a cleavage between Western Europe and the East.
An experiment is about testing whether or not an hypothesis is true, and an experiment which found that the hypothesis is not correct also provides useful information.
I have been much involved since about 1980 in an experiment, which is no longer an experiment, for teaching algebra and geometry in middle schools in China.
It is a big brother experiment like no other, an experiment which will boldly go where few have gone - or probably wanted to go - before.
During this meeting, Professor Henry and Bell conduct an experiment which they produce noise from a coil by exciting the coil with a current of electricity.
