We ordered new materials for experiments.

He decided to become a subject of the human experiment for the new drug.

He is trying to write an experimental novel.

He conducts research in the laboratory every day.

In order to find the empirical formula of this compound, you must first calculate the ratio of elements.

It is reported that North Korea has conducted another nuclear bomb test.

He is looking for a proving ground to test his new theory.

He conducted a thought experiment to solve a problem in physics.

He likes to take a walk in the park at dusk.

He admitted that it is difficult to execute the plan, saying 'it is easier said than done.'