Momentum keeps it real – in the lecture (and notes), it was claimed that the expectation value of momentum, , will always be real in spite of the imaginary operator for p. by computing −* ∗ , where the ∗ superscript denotes complex conjugate, show that the above claim is true, thus verifying that the operator for p is hermitian.

vapour or gas assuming atmospheriv pressure

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.