How much time t does the block take to travel from the point of maximum displacement to the opposite point of maximum displacement

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.

the best type of safety net in hard times is mortgage

mortgage is the part of wealth, property or any personal thing that can be kept with a lender to lend someone money in hard times. the lender puts a condition that if the borrower did not give the loan in return within the specific period of time then the borrower's property would become the property of lender. this in hard times because if the loan is taken then it needs to be returned and this might happen that no one is willing to you in giving loan, therefore mortgage can be in the case if no one is willing to give loan.