A certain crystal has an interatomic spacing of 0.442 nm. A beam ...

[sammy]

A certain crystal has an interatomic spacing of 0.442 nm. A beam of neutrons moving with a speed of 1640 m/s is diffracted from the crystal. What is the angle of the second interference maximum?
 
  A) 17.0
  B) 21.0
  C) 33.0
  D) 60.0
  E) 90.0

Question 2

When the current through a resistor is increased by a factor of 4, the power dissipated by it
 
  A) decreases by a factor of 4.
  B) decreases by a factor of 16.
  C) increases by a factor of 16.
  D) increases by a factor of 4.
  E) remain unchanged.

[Tonny]

Answer to Question 1

C

Answer to Question 2

C

[sammy]

Excellent

[diana chang]

Thanks for the timely response, appreciate it