For general projectile motion with no air resistance, the horizontal component of a projectile's acceleration

What is the primary force that suspension bridges use cables to hold their spans up? a. tension force b. resistance force c. normal force d. elastic force e. applied force

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

In an experiment, how can i change human errors? be specific.