Water flowing through a pipe suddenly comes to a section of pipe ...

[karateprodigy]

Water flowing through a pipe suddenly comes to a section of pipe where the pipe diameter decreases to 86 of its previous value. If the speed of the water in the larger section of the pipe was 36 m/s, what is its speed in this smaller section?
 
  A) 49 m/s
  B) 42 m/s
  C) 31 m/s
  D) 27 m/s

Question 2

Alpha particles (charge = +2e, mass = 6.68  10-27 kg, e = 1.60  10-19 C) are accelerated in a cyclotron to a final orbit radius of 0.90 m. The magnetic field in the cyclotron is 0.30 T.
 
  The period of the circular motion of the alpha particles is closest to A) 0.44 s.
  B) 0.67 s.
  C) 0.87 s.
  D) 1.1 s.
  E) 1.3 s.

[makaylafy]

Answer to Question 1

A

Answer to Question 2

A

[karateprodigy]

Gracias!

[recede]

Excellent