According to the nebular hypothesis, how did most of the excess dust and gas in the solar system get removed?
a. the gas and dust formed all the planets.
b. the solar wind pushed the excess gas and dust away.
c. the gas and dust were burned up during nuclear fusion.
d. the outer planets pulled the excess dust and gas into orbit around them.

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