<span>Nuclei of u-238 atoms are </span><span>unstable and spontaneously emit alpha particles.</span>
Answer: Gamma rays, x-rays, ultraviolet rays, visible light, and infrared rays.
Answer: The light bends because light travels fast but it slows down in a denser medium. For example light refracts in water or it bends after passing through air. When light passes through air ( a less dense medium ) then through water ( a more dense medium ) the beam of light bends because light travels more slowly in a denser medium then it picks up its pace again once it passes. The density of the substance determines how much the light is refracted. I hope this makes sense and I hope this answered your question!! :)
Answer:
Explanation:
Given
Mass 
Net Force is equivalent to 
with tension T in the string
For mass 
For cylinder
I for solid cylinder is 
thus 
Substitute the value of T we get
