What forces are included on a free-body diagram for a chosen object? all the forces exerted on or by the object.

all forces that exist within the neighborhood of the object

all the forces exerted by the object, but not on it

all the forces exerted on the object, but not by it

Convection currents are caused by differences in what two things?

Jenny wants to test the electrical conductivity of two substances dissolved in water. she is preparing the containers for the experiment. which factor is most important for her to control? a) volumes of the solutions b) appearance of the solutions c) temperatures of the solutions d) concentrations of the solutions

Aspectroscope breaks light up into its colors, allowing scientists to analyze light from the solar system and universe. by studying the spectral line patterns, widths, strengths and positions, scientists can determine the speed, position, and of celestial bodies. a) age b) origin c) rotation d) temperature