A spool of wire of mass 5.2 kg and radius 0.97 m is unwound under a constant wire tension 10 N. Assume the spool is a uniform solid cylinder that rolls without slipping. Find the friction force on the bottom of the spool. Let right be positive.

This is the substance(s) formed in a chemical reaction.

How are series and parallel circuits simililar? both have multiple paths for electrons to travel. both require resistors in their circuits. both require a switch to complete the circuit. both have at least one path for electrons to travel.

Based on the concept of the wave-like nature of light, huygens' theory of light postulates that the more light was "bent" by a substance the slower it would move while traversing across that substance. a) deflection b) interference c) refraction d) resonance