The decline bench press gives you have a limited range of motion. You can use more weight because of both mechanical advantage and less total work being performed. By only bringing the bar down to your lower chest, you severely limit the distance you move the bar.
The time difference that you sense is due to the way sound and light travel. Light travels extremely fast (300,000,000 m/s). In fact, it is faster than anything else. Sound travels at a measly 343 m/s through air. Therefore we can see light in an instant, but it takes a while to hear thunder. Sound has another disadvantage because it tends to bounce off molecules in the air. This makes the sound travel in all different directions.
Sound breaks the light barrier. Jan 12, 2007 2007-01-12T09:53:50+0000. Nothing can travel faster than lightâ¦ except for sound. This is the claim of some US physicists, who say they have designed an unusual waveguide to make sound move at superluminal speeds (Appl. Phys. Lett. 90 014102). Sound often comprises numerous superimposed waves of various wavelengths.