radiation....?

Question

When in space, astronauts usually receive a radiation does of about 1000 (micro)Sv per day. The maximum allowable annual dose for people working with radiation is 50 mSv.

The normal annual background dose per year on Earth is 2mSv. how many days does it take for astronauts to exceed this dose?

Okay, so I changed 1000 (micro)Sv to .001Sv. So each day, astronauts receive .001 Sv. Every YEAR, people on EARTH get 2000 Sv. It's asking how long will it take an astronaut to reach this limit. How would you work that out?

Answer 1

1000 (micro)Sv = 1 mSv
micro = 10^-6
milli = 10^-3

so it takes 2 days in space to reach 2 mSv
and it takes 50 days in space to reach 50 mSv

You should have written
1 (micro)Sv = 0.000 0001 Sv
1000 (micro)Sv = 0.001 Sv
2 mSv = 0.002 Sv

Answer 2

1000 microSv = 1000 x 10^-6 = 1 x 10^-3

50 milliSv = 50 x 10^-3 = 0.05 Sv

0.05 / 1 x 10^-3 = 50 days (to get to radiation worker levels)

0.02 / 1 x 10^-3 = 20 days (for equivalent of normal background radiation on Earth)

Answer 3

oh man, its simple just refer to the chassidut notes and ull find the answer.