because the P waves move faster through more rigid substances than through non rigid material>
P waves travel faster through the lithosphere than the asthenosphere because the lithosphere is more rigid and denser, allowing the P waves to propagate more efficiently. In contrast, the asthenosphere is partially molten and less rigid, which slows down the speed of the P waves as they encounter less resistance and obstacles.
Plasticity and convection occur in the asthenosphere, which is part of the upper mantle. The asthenosphere is a semi-molten layer below the lithosphere where rock can flow slowly over long periods of time. Convection within the asthenosphere is driven by heat from the Earth's core, causing movement of material in the mantle.
Sound can travel faster through space because space is a vacuum where there are no particles to slow down the transmission of sound waves. In a room at room temperature, sound travels through the molecules of the medium, such as air, which can slow down its speed.
Water typically travels faster through gravel than sand soil because gravel has larger pore spaces that allow water to flow more easily. Sand soil has smaller pore spaces which can slow down the movement of water.
by low-density, semiplastic (or partially molten) rock material chemically similar to the overlying lithosphere. The upper part of the asthenosphere is believed to be the zone upon which the great rigid and brittle lithospheric plates of the earth's crust move about (see plate tectonics). The asthenosphere is generally located between 45—155 miles (72—250 km) beneath the earth's surface, though under the oceans it is usually much nearer the surface and at mid-ocean ridges rises to within a few miles of the ocean floor. Although its presence was suspected as early as 1926, the worldwide occurrence of the plastic zone was confirmed by analyses of earthquake waves from the Chilean earthquake of May 22, 1960. The seismic waves, the speed of which decreases with the softness of the medium, passed relatively slowly though the asthenosphere, thus it was given the name Low Velocity zone, or the Seismic Wave Guide (see seismology). Deep-zone earthquakes, i.e., those that occur in the asthenosphere or below it, may be caused by crustal plates sinking into the mantle along convergent crustal boundaries.
P waves travel faster through the lithosphere than the asthenosphere because the lithosphere is more rigid and denser, allowing the P waves to propagate more efficiently. In contrast, the asthenosphere is partially molten and less rigid, which slows down the speed of the P waves as they encounter less resistance and obstacles.
Although its presence was suspected as early as 1926, the worldwide occurrence of the asthenosphere was confirmed by analyses of earthquake waves from the Great Chilean Earthquake of May 22, 1960.
The denser the faster. ie: it will travel faster through quartz than sandstone.
sound travel faster through soled because of tighter packed particles
Waves travel faster through denser materials. However, Electromagnetic waves travel faster through less dense materials. It travels fastest in vacuum.
Light travels much faster than sound, through wood.
Sound
Air.
15 times faster
sound travels faster through water than air.
no sound travels faster through solids.
Under the pressure and temperature conditions of the Earth's mantle, minerals can (very slowly) be deformed without cracking. This is called ductile deformation. A lot of the deformation in mantle rocks is accomplished by this mechanism. The ultimate cause for the asthenosphere to move is the gradient of temperature between the core and the surface that drives mantle convection. Hot material moves up from the lower portions of the mantle and cold material sinks down.