Please help me it's a test

B. Box X will move at a constant speed nd box Y will remain at rest.

Explanation:

Box X has a dominant force causing it to move but at constant rate due to the resistance of the other force, while box Y will remain at rest due to equal forces pushing against each other.

Hope this helps!

pure water does not conduct electricity very well. however, when certain substances are dissolved in water, the solution does conduct electricity. you can make a simple device that shows how well a solution conducts electricity. this device uses a flashlight bulb to indicate how well the solution conducts electricity. the better the solution conducts electricity, the brighter the bulb will glow.

explanation:

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.