A circle has a diameter of 3.302 cm What is the area of the circle in cm^2? A nu

Question

A circle has a diameter of 3.302 cm What is the area of the circle in cm^2? A numeric value is expected and not an expression. Suppose your speedometer has an uncertainty of 1.5 km/h at a speed of 89 km/h What is the percent uncertainty in your speed? A numeric value is expected and not an expression. If the speedometer has the same percent uncertainty when it reads 58 km/h. what is highest speed, in kilometers per hour, that you might be going? A numeric value is expected and not an expression. S_max = If the speedometer has the same percent uncertainty when it reads 58 km/h, what is lowest speed, in kilometers per hour, that you might be going? A numeric value is expected and not an expression. S-min =

Explanation / Answer

A )

Aea of the circle = pi*r2 = 3.14 *(3.302/2)2 = 8.563 sq.cm

20): Spedometer reading = 89 km/hr

             uncertainity = 1.5 km

a) percentage uncertainity = 1.5/89 *100 = 1.69 %

speeedo meter reading = 58 kmph

uncertanity = 58*0.0169 = 0.98 kmph

b) upper limit of the speed = 58.98 kmph

c) lower limit of the speed = 58.0 - 0.98 = 57.02 kmph

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