What is the layer of the earth that consists of the crust and upper mantle?

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?

Determine el momento angular de un rueda de 3000g moviendose a 10m/s con un radio de giro de 400cm

Which articulations allow for greatest range of motion?