Calculate the maximum absolute uncertainty for R if: R = B - A
A = 32 +/- 2 seconds
B = 11 +/- 3 seconds

43 seconds

1 second

21 seconds

5 seconds

6 seconds

 ΔR = 5 s

Explanation:

The absolute uncertainty or error in an expression is

       ΔR = | | ΔB + | | ΔA

the absolute value guarantees to take the unfavorable case, that is, the maximum error.

We look for the derivatives

        = 1

        = -1

we substitute

       ΔR = 1 ΔB + 1 ΔA

of the data

       ΔB = 3 s

       ΔA = 2 s

       ΔR = 3 + 2

       ΔR = 5 s

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..

the correct choice is a .

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