Discover Questions

Please help with this problem and explain it? Is it possible a black hole is a gateway to another dimension? If both plates are smooth what is the minimum value for theta?as this is a mcq all the answers are in tan^-1.? Compare the different transportation, such as between plane, train and car.? In Algebra, if an eigenvalue of a matrix A is 3 and 5, what is the eigenvalue of matrix A^(-2)?