Which Variable in an Experiment Is Manipulated by the Researcher

question 22

Multiple Choice

Which variable in an experiment is manipulated by the researcher?

• A) Dependent variable
• B) Extraneous variable
• C) Moderating variable
• D) Independent variable
• E) Mediating variable

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Definitions:

Counterbalance Valve

A valve that resists flow in one direction while permitting free flow in the other. Often connected to the outlet of a double-acting ram to support weight and prevent sudden, uncontrolled dropping.

Back Pressure

Back pressure is the resistance or force opposing the desired flow of fluids in piping systems, engines, or turbines, often deliberately used to optimize engine efficiency or control fluid movement.

Pressure Reduction

The process of lowering the pressure in a system, often used in fluid or gas applications to manage flow and prevent damage.

Hydraulic Circuit

A system using pressurized fluid to power devices, often consisting of pumps, pipes, valves, and actuators.