Two blocks sliding on a frictionless surface with the less massive block moving twice as fast as the more massive block. Eventually, the smaller block catches up and collides with it, and sticks. What is the speed of the two blocks after the collision given the speed of the more massive block is

Space-time metric ds2= -dt2+at2dx2+bt2dy2+ct2dz2 (a)how does the area of a rectangle with vertices at ( x=0, y=0, z=0 ), (1,0,0 ), ( 0,1,0 ) and (1,1,0 ) changes with time? (b) if a photon moving in the x direction starts from the origin at t=1, when does it reach x=l? (ds=0 for the trajectory of a photon.) (c) the proper time for a particle is defined by cd=ds. what is the proper time for a particle to move along the trajectory ( x(t)=t, y(t)=0, z(t)=0 ) from t=0 to 1 ? what is the condition on the parameter a so that the velocity of the particle never exceeds the speed of light ?

Aknife blade is a(n) a. lever b. screw c. wedge d. inclined plane

Explain the consequences of this addiction to the brain tissue