If an object has zero resultant force on it, can it be moving? can it be accelerating?

An incident ray through the focal point of a spherical mirror will: reflect through the center of curvature. reflect back through the focal point. reflect parallel to the principle axis. reflect the same direction as the incident ray.

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

Which levels of government establish and implement educational requirements for minors