Which of the following has the shortest wavelength, assuming that ...

[swpotter12]

Which of the following has the shortest wavelength, assuming that they all have the same speed?
 
  A) electron
  B) water molecule
  C) baseball
  D) helium atom
  E) None of these objects have wavelengths of any kind.

Question 2

You are driving along a highway at 35.0 m/s when you hear the siren of a police car approaching you from behind at constant speed and you perceive the frequency as .
 
  You are relieved that he is in pursuit of a different driver when he continues past you, but now you perceive the frequency as What is the speed of the police car? The speed of sound in air is
  A) 40.1 m/s B) 41.7 m/s C) 39.2 m/s D) 30 m/s E) 38.4 m/s

[annierak]

Answer to Question 1

C

Answer to Question 2

A

[swpotter12]

Gracias!

[ecabral0]

Excellent