En una Mezcla: 1. Las sustancias obtenidas conservan sus propiedades originales
2. Aparecen nuevas sustancias
3. Las sustancias iniciales son en cantidades fijas
4. Se separan solo por procedimientos químicos

a.

explanation:

the force required to move the cart is divided by three or 33.33 n.

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.