A ball is thrown at a 30.0 angle above the horizontal across ...

[jilianpiloj]

A ball is thrown at a 30.0 angle above the horizontal across level ground. It is released from a height of 2.00 m above the ground with a speed of 18.0 m/s. How far does the ball travel horizontally before it strikes the ground?
 
  A)
 
  28.6 m
 
  B)
 
  24.0 m
 
  C)
 
  26.5 m
 
  D)
 
  10.5 m
 
  E)
 
  31.7 m

Question 2

A diffraction grating has 5000 lines per cm. The angle between the central maximum and the fourth order maximum is 47.2. What is the wavelength of the light?
 
  A)
 
  138 nm
  B)
 
  183 nm
  C)
 
  367 nm
  D)
 
  452 nm
  E)
 
  637 nm

[rnehls]

Answer to Question 1

E

Answer to Question 2

C

[jilianpiloj]

Thanks

[rnehls]

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