50 Points, It is about Inquiry, Experiment, Controlled Variable, Independent Variable, Hypothesis, and Dependent Variable.

1) dependent

2) Experiment

3) Controlled variable

4) hypothesis

5) Inquiry

Explanation:

The dependent variables are those variables that change when the experimental or independent variable is being manipulated.

An experiment is a carefully designed study that tends to establish a cause and effect relationship between two or more variables.

A control variable is any variable which is held constant or unchanged throughout the course of the investigation(experiment).

Hypothesis is a precise statement which can be tested and predicts the outcome of the study.

The independent variable is the variable that is being manipulated.

a) electrical > light, sound, and thermal< < < <

) the mechanical energy of the firefighter moving.< < < < a) electrical > light, sound, and thermal< < < <

c) both a and b.

multiply 2kg by latent heat of vap