If a and b are hermitian operators, prove that (1) the operator of ab is only hermitian if a and b commute, and (2) the operator (a+b)" is hermitian

What determines the amount of inertia an object has

What would people living along the coast in south florida do if there was a hurricane warning? move to locations away from the water flock along coasts to watch the natural phenomenon buy instruments to predict the exact location of the hurricane measure water levels to know the exact time of the hurricane

During the past 150 years in the united states, how did energy consumption compare to population growth