Who discovered that the proton has a positive charge

How many times did thomas edison mess up the light bulb

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.

What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass