Friction is not useful in Machinery sometimes, Since it leads to the wear and tear of machine parts.
Collision Coverage Example:
You're driving down the street and rear end the car in front of you. Your liability insurance will pau for the damage done to the other car, and your Collision insurance (or coverage) will pay for the damage done to your own vehicle because this was an accident in which you collided with another vehicle.
Comprehensive Coverage Example:
When there's damage to your windshield; damage from natural disasters and bad weather conditions, like wind storms, hurricanes, floods, earthquakes, hail, etc,.
Hope I helped!
the answer is
Image 1 shows a monomer, and Image 2 shows a polymer.
Longitudinal. (just remember that Transverse waves are perpendicular. T is like an inverted perpendicular sign)
