Select the correct answer in the box. Spell the words correctly. Differences in materials used for production, methods of operating manufacturing equipment, and performance of workers cause products to differ from each other. What is the term for such differences?

Differences in characteristics of two units of a product produced by the same company is referred to as _ .

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 ?

According to social exchange theory, altruistic behaviors benefit the individual who performs them.

Which two particles are found in the center of an atom