GEOLOGY

Detailed explanation-1: -In a P wave, the rock particles are alternately squished together and pulled apart (called compressions and dilatations), so P waves are also called compressional waves . These waves can travel through solids, liquids, and gases. P waves can travel through the liquid outer core .

Detailed explanation-2: -P waves can travel through liquid and solids and gases, while S waves only travel through solids. Scientists use this information to help them determine the structure of Earth. For example, if an earthquake occurs on one side of Earth, seismometers around the globe can measure the resulting S and P waves. SF Fig.

Detailed explanation-3: -P waves are the first waves that are detected by a seismograph. They are the fastest seismic waves and can travel through gases, liquids, or solids.

Detailed explanation-4: -Because gas molecules are the farthest apart, sound travels through them at the lowest frequencies. Since there is nothing for the sound to move through in a vacuum, it cannot travel. Sound can therefore travel through solids, liquids, and gases.

Detailed explanation-5: -P-waves travel through liquids and gases as well as through solids. Although liquids and gases have zero rigidity, they have compressibility, which enables them to transmit P-waves. Sound waves are P-waves moving through the air.