Labor rates must take into account both the base labor paid to teh mechanic plus the following factors: 1  Mechanics overhead costs - hand tools he usually has to provide. 2  Shop overhead including many consumables, lights, compressors, ramps, lifts, large equipment like alignment and diagnosis tools, cleaning facilities, bathrooms and water.
A wave is a way in which energy travels from one place to another. There are many kinds of waves, such as water waves, sound waves, light waves, radio waves, microwaves and earthquake waves. All waves have some things in common.
Waves are a means of transferring energy, without actually transporting matter. Waves can be either transverse or longitudinal. Transverse waves can be set up on a string or on the surface of water. For this type of wave, the disturbance is at a right angle to the movement of the wave. Longitudinal waves can be set up on a spring, in the air when a sound wave passes, or in heavy traffic.