Question

Answer both... The question

Answer 1

Answer:

31.Alpha or ( α ) particle consists of Alpha particle consists of 2 protons,2 neutrons, and 2 electrons.As the atomic structure is similar to Helium ( He ) element where the element has 2 protons,2 neutrons, and 2 electrons.

30.

     ( Formula for stopping distance = u² / 2gsin θ )

     stopping distance x₁ = u² / 2gsin 60°  

     stopping distance x₂=u² / 2gsin 30°    

   ratio of x₁:x₂ = ( u² / 2gsin 60° ) / ( u²/2gsin 30° )

                        = 2/2√3

                        = 1/√3

Hence, the ratio is 1 : √3 ( 3rd option )