An object stays at rest until what happens to it?

Which of the following represents an upright image? a. -do b. +m c. -m d. +do

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt