Author Question: If the initial speed of a projectile is doubled. A) Its range will be increased by 1.41. B) Its ... (Read 42 times)

bobbysung · **on:** Jul 29, 2018

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.