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.

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.

While the change in blank will remain the same during a collision, the force needed to bring an object to a stop can be blank if the time if collision is blank

As microwave light travels through a liquid, it moves at a speed of 2.2 x 108 m/s. if the frequency of this light wave is 1.1 x 108 hz, what is the wavelength of this microwave?