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.
Its value is measured at 299,792,458 meters per second. Speed of sound on the other hand, is the distance that sound travels through an elastic medium. In dry air with a temperature of 20 Â°C, the speed of sound is measured at 343.2 meters per second. This translates to 1,236 kilometers per hour, or about one kilometer every three seconds. As mentioned previously, the speed of light is denoted by a âcâ, which stands for constant.