When a proton is traveling at 0.80c, what is the ratio of its ...

[savannahhooper]

When a proton is traveling at 0.80c, what is the ratio of its kinetic energy to its rest energy?
 
  A) 0.60
  B) 0.67
  C) 0.80
  D) 1.2
  E) 1.7

Question 2

A single thin slit forms a diffraction pattern, with the first minimum at an angle of 40.0 from central maximum. If monochromatic light of 530.0-nm wavelength is used for the illumination, what is the width of the slit?
 
  A) 825 nm
  B) 791 nm
  C) 757 nm
  D) 723 nm
  E) 689 nm

[tdewitt]

Answer to Question 1

B

Answer to Question 2

A

[savannahhooper]

TYSM

[sultansheikh]

Gracias!