Which two changes would increase the gravitational force between two objects?
A. Increase the mass of one of the objects.
B. Increase the distance between the objects.
C. Decrease the mass of one of the objects.
D. Decrease the mass of both objects.
E. Decrease the distance between the objects.

He viscosities of several liquids are being compared. all the liquids are poured down a slope with equal path lengths. the liquid with the highest viscosity will

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

The illuminance of a surface varies inversely with the square of its distance from the light source. if the illuminance of a surface is 120 lumens per square meter when its distance from a certain light source is 6 meters, by how many meters should the distance of the surface from the source be increased to reduce its illuminance to 30 lumens per square meter?