Two sources of light illuminate a double slit simultaneously. One ...

[misspop]

Two sources of light illuminate a double slit simultaneously. One has wavelength 570 nm and the second has an unknown wavelength. The m = 5 bright fringe of the unknown wavelength overlaps the m = 4 bright fringe of the light of 570 nm wavelength.
 
  What is the unknown wavelength? A) 456 nm
  B) 326 nm
  C) 380 nm
  D) 713 nm

Question 2

A flatbed truck is carrying a 20.0-kg crate along a level road. The coefficient of static friction between the crate and the bed is 0.400, and the coefficient of kinetic friction is 0.300.
 
  What is the maximum acceleration that the truck can have if the crate is to stay in place relative to the truck?
  A) 8.00 m/s2 B) 3.92 m/s2 C) 196 m/s2 D) 78.5 m/s2 E) 7.84 m/s2

[catron30]

Answer to Question 1

A

Answer to Question 2

B

[misspop]

Excellent

[sultana.d]

Gracias!