Which action describes an experimental investigation? A. Measuring the temperatures at which two rock samples melt
B. Comparing the sizes of the crystals in two rock samples
C. Exploring the relationship of the material in a rock sample and its
hardness
D. Describing the types of materials that make up one rock sample

Asquare 1m x 1m plate is shown below. all four of its edges are kept at 0 co. at t=0the temperature distribution is given by: y xtsins n75)=.a) using separation of variables determine the temperature distribution t(x, y,t)along the plate at any time t. b) discretize the heat conduction equation +=22222 txtusing a second-order centered difference scheme for the two second derivatives and a first-order forward euler scheme for the first derivative. using von neumann stability analysis, determine the stability criterion for the proposed discretization scheme in terms of , hand t. solve for the maximum allowable time step tmax