Which components of momentum P and angular momentum M are conserved in motion in the following fields?
((a)) the field of an infinite homogeneous plane,
((b)) that of an infinite homogeneous cylinder,
((c)) that of an infinite homogeneous prism,
((d)) that of two points,
((e)) that of an infinite homogeneous half-plane,
((f)) that of a homogeneous cone,
((g)) that of a homogeneous circular torus,
((h)) that of an infinite homogeneous cylindrical helix.