Why is it acceptable to ignore the effects of variables such as air resistance and spin?(1 point) A. It is acceptable to ignore some variables because they are impossible to know.
B. Air resistance and spin never affect the motion of projectiles.
C. It is never acceptable to ignore the effects of any variables.
D. For the purpose of learning kinematics, it’s helpful to simplify equations by removing variables with very small effects.

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