The Four Physical Forces at Work in the Universe Are

question 124

Multiple Choice

The four physical forces at work in the universe are gravitational, electromagnetic, strong nuclear, and weak nuclear forces. Which two of these are very short-ranged, extending over distances of only about 10^-15 m?

• A) strong nuclear and electromagnetic forces
• B) electromagnetic and weak nuclear forces
• C) strong and weak nuclear forces
• D) gravitational and electromagnetic forces

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Definitions:

Interval Variable

An interval variable is a type of numerical data that is measured along a scale, where the distance between each point is uniform and meaningful, but does not have a true zero point.

Stepwise Regression

A method of regression analysis in which variables are added or removed from the model in a step-by-step manner based on specific criteria.

Independent Variables

Variables in an experiment that are manipulated or altered by the researcher to determine their effect on the dependent variable.

Regression Models

Statistical methods used to estimate the relationship between a dependent variable and one or more independent variables.