Joe places two solid objects in contact with each other. Which property determines the direction of the flow of heat between the two objects?
Select all the true

A
density of the objects

B
temperature of the objects

C
material of the objects

D
volume of the objects

Two charged particles, q1 and q2, are located on the x-axis, with q1 at the origin and q2 initially at x1 = 12.2 mm. in this configuration, q1 exerts a repulsive force of 2.62 µn on q2. particle q2 is then moved to x2 = 18.0 mm. what is the force (magnitude and direction) that q2 exerts on q1 at this new location? (give the magnitude in µn.)