One phenomenon that supports the particle theory of matter is ...

[rayancarla1]

One phenomenon that supports the particle theory of matter is
 
  A) the double-slit experiment with electrons.
  B) the tiny flashes that are observed when a light beam strikes a screen.
  C) interference effects with light.
  D) the tiny flashes that are observed when an electron beam strikes a screen.
  E) None of the above.

Question 2

Two taut strings of identical mass and length are stretched with their ends fixed, but the tension in one string is 1.10 times greater than in the other. Waves on the string with the lower tension propagate at 35.2 m/s.
 
  The fundamental frequency of that string is 258 Hz. What is the beat frequency when each string is vibrating at its fundamental frequency?
  A) 12.6 Hz B) 9.00 Hz C) 11.0 Hz D) 17.1 Hz E) 13.7 Hz

[bubulittle310@msn.cn]

Answer to Question 1

D

Answer to Question 2

A

[rayancarla1]

Excellent

[Liamb2179]

Thanks for the timely response, appreciate it