If a galaxy is moving away from us at 1.0 of the speed of light, ...

[formula1]

If a galaxy is moving away from us at 1.0 of the speed of light, use Hubble's law to estimate how far away it is from us if the Hubble constant is 22 km/s per million light-years. (c = 3.00  108 m/s, 1 ly = 9.461  1015 m, 1 y = 3.156  107 s)
 
  A) 140 ly
  B) 14 ly
  C) 140 thousand ly
  D) 140 million ly
  E) 140 billion ly

Question 2

A baseball has mass 143 g and a speed of 45 m/s, with the speed known to within 0.10.
 
  What is the minimum uncertainty in the position of the baseball? (h = 6.626  10-34 J  s)
  A) 1.4  10-30 m
  B) 1.8 nm
  C) 1.4  10-32 m
  D) 1.6  10-32 m
  E) 1.6  10-30 m

[josephsuarez]

Answer to Question 1

D

Answer to Question 2

D

[formula1]

TYSM

[JCABRERA33]

Excellent