Note that , and by the chain rule, . Note that the set of possible velocity vectors forms a vector space. If and are two paths through the origin, then so is and the velocity vector of this path is . Similarly, if is a scalar, then the path has velocity vector . It makes sense to distinguish the velocity vectors at different points. In physics, the set of all velocity vectors gives all possible combinations of position and momentum, and is called phase space.
Often ribs are boiled or oven-steamed before grilling to help tenderize the meat. To oven-steam ribs, place ribs in a large baking pan, fill with about 1 inch of water, cover with aluminum foil and bake for about 50 minutes in a 350-degree oven. The recipe here includes instructions on how to boil ribs before grilling.
1 Grill the ribs for 2 hours, bone-side down. 2  Wrap them in foil and grill, bone-side up, for 30 minutes. 3  Don't be afraid to add an extra special touch here by pouring a cup of apple cider or juice into the foil packet.4  Unwrap them and grill for 30 more minutes bone-side down.efore we get into how long you should grill your ribs there's one important thing to keep in mind: while dry spice rubs should be applied before you start to cook, sauces should not be applied until the last 20 minutes of cooking at the earliest.