Answer:

1.Resistance is a measure of the opposition to current flow in an electrical circuit.

2.When two objects rub together, friction causes some of the energy of motion to be converted into heat. This is why rubbing two sticks together will eventually produce a fire. That's why lubricants, or liquids, are often used to reduce the friction and wear and tear between moving parts.

3.Rough surfaces have more friction than smooth surfaces and liquids such as oil or water are sometimes used as lubricants to reduce the effect of friction. There is no mystery behind friction. It acts on objects at the surfaces so as to prevent or reduce movement between the surfaces.  

4.Friction is a force that occurs when two surfaces slide past one another. The force of friction opposes the motion of an object, causing moving objects to lose energy and slow down.

5.The relationship between surface texture and friction between two dry sliding surfaces is more complex than it first appears. Making a surface rougher or smoother may not always affect the sliding friction. In addition to this, for certain textures and materials, making a surface smoother reduces friction.