Any physicist around. Help me solve this question. Am giving the brainliest

Which force is most responsible for binding together an atom's protons and neutrons? electrostatic gravitational nuclear magnetic

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?

Física: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25º, b) el tiempo que el balón permanece en el aire.