Which choice best explains the definition of a variable? 1.A variable is one way that scientists collect and record data in a scientific investigation.

2.A variable is something that can change and may affect the outcome in a scientific investigation.

3.A variable is a type of testable question that scientists ask when beginning a scientific investigation.

4.A variable is an educated guess that scientists make before conducting a scientific investigation.

I don't have the answer but...

Explanation:

A variable is a quantity that may change within the context of a mathematical problem or experiment. Typically, we use a single letter to represent a variable. The letters x, y, and z are common generic symbols used for variables.

A variable is a quantity that may change within the context of a mathematical problem or experiment. Typically, we use a single letter to represent a variable.

a small object of mass 3.66 g and charge -17.6 µc is suspended motionless above the ground when immersed in a uniform electric field perpendicular to the ground. what are the magnitude and direction of the electric field?