A 50,000-kg train car moving at 2 m/s collides and connects to another identical car initially at rest. Show all calculations.

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.

as a general rule, scissors have blades less than 6 in (15 cm) long and usually have handles with finger holes of the same size. shears have blades scissors used to cut hair or fabric must be much sharper.

i guess it’s a and b

a lot of it means it can be "burned" for energy and sold at one price. if it is scarce, the price will go up