What is the electrical force between two balloons both charged with - 5.5 * 10 ^ - 8 if they are 0.35 m apart from their centers ?

A1200 kg car traveling north at 10 m/s is rear-ended by a 2000 kg truck traveling at 30 m/s. what is the total momentum before and after the collision?

Which is not one of the major climate zones? question 3 options: rain forest polar tropical temperate

Which of the following is the main energy source for the sun? a. fission of hydrogen b. fusion of hydrogen c. fusion of helium d. fission of iron