It has become popular for some people to have yearly whole-body scans (ct scans, formerly called cat scans), using x-rays, just to see if they detect anything suspicious. a number of medical people have recently questioned the advisability of such scans, due in part to the radiation they impart. typically, one such scan gives a dose of 12 msv, applied to the whole body. by contrast, a chest x-ray typically administers 0.20 msv to only 6.0 kg of tissue. how many chest x rays would deliver the same total amount of energy to the body of a 85 kg person as one whole-body scan?

Explanation:

Given

One CT scan gives a dose of 12 mSv

and a chest X ray typically administer 0.2 mSv to 6 kg tissue

mass of Person

therefore

N no of x-Ray equals to 12 mSv dose of CT scan

Therefore total no of x ray required is

do you have a formula possibly

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day