Question

The airspeed velocity of an unladen swallow is 10.00 meters per second. What is it in miles per hour? You must use appropriate significant figures to receive full credit (3 pts) 1 in = 2.54 cm, 100 cm = 1m, 12 in =1ft, 5280 ft = 1 mile, 60 s = 1 min, 60 min = 1 hour

Answer 1

Answer : The  speed in miles per hour is 22 mile/hr.

Explanation :

The conversion used from meters to miles is:

$1m=100cm\times \frac{1in}{2.54cm}\times \frac{1ft}{12in}\times \frac{1mile}{5280ft}$

The conversion used from second to hour is:

$1s=\frac{1}{60}min\times \frac{1hr}{60min}$

The conversion used from meter per second to mile per hour is:

$1\frac{m}{s}=\frac{100cm\times \frac{1in}{2.54cm}\times \frac{1ft}{12in}\times \frac{1mile}{5280ft}}{\frac{1}{60}min\times \frac{1hr}{60min}}$

$1m/s=2.2mile/hr$

As we are given the speed 10.00 meter per second. Now we have to determine the speed in miles per hour.

As, $1m/s=2.2mile/hr$

So, $10.00m/s=\frac{10.00m/s}{1m/s}\times 2.2mile/hr=22mile/hr$

Therefore, the speed in miles per hour is 22 mile/hr.