the total area of the speed of the alveoli in the human lung is about 7.0x 10^5cm^2 .what is the area in square meters? (2) the radius of earth I'll 6.4x10^ 3 km.fine the the surface area of the earth in
square meters.
(3) a BMW convertible travels on the German autobahn at a speed of 128 km/h .what is the speed of the car in meters per second?
3 answers
7 * 10^5 cm^2 * 10^-2 m/cm * 10^-2 m/cm = 7 * 10^1 m^2 = 70 m^2
r = 6.4 * 10^3 km * 10^3 m/km = 6.4*10^6 meters
area of sphere = 4 pi r^2 = 4 * 3.14 * 6.4^2 * 10^12
= 514.5 *10^12 m^2
= 5.15 * 10^14 m^2
area of sphere = 4 pi r^2 = 4 * 3.14 * 6.4^2 * 10^12
= 514.5 *10^12 m^2
= 5.15 * 10^14 m^2
128 km/h * 1000 m / km * 1 hour/3600 seconds = (128/3.6) meters/second