If the initial speed of a projectile is doubled. A) Its range ...

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If the initial speed of a projectile is doubled.
 
  A) Its range will be increased by 1.41.
  B) Its range will double.
  C) Its range will be decreased by a factor of two.
  D) Its range will quadruple.
  E) Its range will decrease by a factor of four.

Question 2

Light of a given wavelength is used to illuminate the surface of a metal, however, no photoelectrons are emitted. In order to cause electrons to be ejected from the surface of this metal you should
 
  A) use light of a longer wavelength.
  B) use light of a shorter wavelength.
  C) use light of the same wavelength but increase its intensity.
  D) use light of the same wavelength but decrease its intensity.

[abro1885]

Answer to Question 1

D

Answer to Question 2

B

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Gracias!

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TYSM