Of what?, be more specific.
Answer:
B. P waves can travel through liquids
Explanation:
P waves or primary waves are elastic waves produced from an earthquake. They are the first waves that arrives a Seismic station when an earthquake disturbs the earth.
P and S waves are both body waves that moves within the earth.
P- waves travel faster than S- waves and can propagate through any medium. S-waves or Secondary waves are shear waves that can only propagate through soilds.
Both waves are longitudinal and moves parallel to their source of propagation. They move by disturbing other particles in their line.
Transverse waves are the love and rayleigh waves. They are both surface waves that travels and cause disturbance on the surface of the earth during an earthquake. They move up and down.
Attempting to persuade MPs, Mr Johnson said the deal allowed the UK to leave the EU bloc "whole and entire" and that it protected the Irish peace process.
"I hope very much now... that my fellow MPs in Westminster do now come together to get Brexit done, to get this excellent deal over the line and deliver Brexit without any more delay," he said.
MPs will debate and vote on whether to accept the deal on Saturday, during a special sitting in the House of Commons. Opposition leaders have indicated they will not throw their weight behind it without a second referendum on Brexit.
If the deal is rejected, attention will turn to whether Mr Johnson will ask the EU for a Brexit delay, as he is compelled to do under legislation. The Benn Act blocks Britain leaving the EU without a deal on 31 October but Mr Johnson seems intent on exiting on that date, deal or no deal.
On Thursday President of the European Commission Jean-Claude Juncker ruled out an extension, saying: "If we have a deal, we have a deal and there is not need for prolongation."
