Question

#1. A rectangular airstrip measures 34.60 m by 280 m, with the width measured more accurately than the length. Find the area (in m²), taking into account significant figures.

#2. A rectangle has a length of (2.8 ± 0.1) m and a width of (1.4 ± 0.2) m. Calculate the area and the perimeter of the rectangle, and give the uncertainty in each value.

a. Calculate the area and give its uncertainty. (Enter your answers in m².)

b. Calculate the perimeter of the rectangle and give its uncertainty. (Enter your answers in m.)

#3.Suppose your hair grows at the rate of 1/58 inch per day. Find the rate at which it grows in nanometers per second. Because the distance between atoms in a molecule is on the order of 0.1 nm, your answer suggests how rapidly atoms are assembled in this protein synthesis.

Answer 1