In a Classroom on the First Spaceship to an Extrasolar

Multiple Choice

In a classroom on the first spaceship to an extrasolar planet--there are children because the trip will take 200 years--a teacher is showing charge Q uniformly distributed along a conducting rod of length L₀ to produce linear charge density λ₀. As observed on Pluto when the spaceship passes it at 0.800 c, the linear charge density is

A) 0.360 λ₀.
B) 0.600 λ₀.
C) 0.800 λ₀.
D) 1.00 λ₀.
E) 1.67 λ₀.