Alpha particles cannot reach you if you are more than a few centimetres away from the source. Explain why this makes the alpha source safe if it is outside your body.

How many times did thomas edison mess up the light bulb

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.