Question

I use a thermometer graduated in 1/5 degree Celsius to measure outside air temperature. Measured to the nearest 1/5 degree, yesterday's temperature was 22.4 degrees Celsius and today's is 24.8 degrees Celsius. What is the relative uncertainty in the temperature difference between yesterday and today?

Answer 1

I got 16.7 percent

Answer 2

@Michele_Laino

Answer 3

@freckles

Answer 4

@Preetha

Answer 5

@SolomonZelman

Answer 6

can you help @jdoe0001

Answer 7

I would medal

Answer 8

@phi

Answer 9

I am thinking the temp difference is 2.4 deg
the uncertainty is 0.2 on the first measurement and 0.2 on the 2nd
so the relative uncertainty *might* be 0.4/2.4
however, I think people combine uncertainty to get sqr(2) * 0.2 (rather that 2*0.2)
if that is correct (I'm a bit hazy on this), you would get 0.2828/2.4 = 11.8%

Answer 10

the answer is actually 7.7 perccent

Answer 11

If you know how they got that number, please post the math

Answer 12

ok. I would figure it out

Answer 13

24,8-22,4=2,4

22,4 ---- 100%
2,4 ----- x%
-----------------

x = 2,4*100/22,4 = 10,71 %

Answer 14

wrong

Answer 15

I am sorry