8. A rectangle is measured to be 6.4 +0.2 cm by 8.3 $0.2 cm. a) Calculate its perimeter in cm

b) Calculate the uncertainty in its perimeter.

a) The perimeter of the rectangle is 29.4 centimeters.

b) The uncertainty in its perimeter is 0.8 centimeters.

Explanation:

a) From Geometry we remember that the perimeter of the rectangle (), measured in centimeters, is represented by the following formula:

(1)

Where:

- Width, measured in centimeters.

- Length, measured in centimeters.

If we know that and , then the perimeter of the rectangle is:

The perimeter of the rectangle is 29.4 centimeters.

b) The uncertainty of the perimeter (), measured in centimeters, is estimated by differences. That is:

 (2)

Where:

- Uncertainty in width, measured in centimeters.

- Uncertainty in length, measured in centimeters.

If we know that and , then the uncertainty in perimeter is:

The uncertainty in its perimeter is 0.8 centimeters.

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d

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