How many dwarf planets are there in the solar system?
Answer:
Apart from Pluto, Ceres and Eris (UB313) have also been classified as dwarf planets. Until recently, Ceres was called the largest asteroid. It has a diameter of about 950 kilometres (600 miles) and is in the asteroid belt between Mars and Jupiter. Eris is the largest of all the dwarf planets. It has a diameter of about 3,000 kilometres (1,850 miles).
Question:
When you transfer momentum between two objects, why is it that the change in total momentum is 0?
