Determine how far sound travels in 9 minutes. Express your answer in feet.?

Answer 1

The speed of sound=1116.43701 feet/sec.

There are 60 seconds in a minute.

You do the rest.

Answer 2

the actual answer to this question has already been given, but your question raises a more interesting point. If you ever forget an equation or forget what units to express your answer in then you should use something called Dimensional Analysis

Dimensional analysis is very similar to using an equation, but you dont put in numbers, you put in the dimension, or units. The units on the left must equal the units on the right of the equal sign

Eg d=v*t or in units
distance=(distance/time)*time
your units are feet and minutes
so feet=(feet/minutes)*minutes
instantly you see the units of minutes cancel and leave feet.
To answer your question, you need the speed of sound in feet per minute and time in minutes (as these are the values you are given). All units of time must be in the same units, ie not minutes and years or seconds and hours. It may be more convenient to use the speed of sound in feet per second, but to get the units to cance you need the 9 minutes in seconds.

Another use of dimensional analysis is to tell you what units a quantity has, should you forget.
eg the equation F=m*a, the units are newtons, but suppose you forget. If the units are in SI (kg m s), which is common then force has units of
F=mass*acceleration
F=kg*(metres/seconds^2), often said as kilograms metres per second squared. This is equivalent to a Newton, but writing down kgms^-2 is the same.

Dimensional Analysis is very useful, you can derive entire equations just by looking at the units, and making the units cancel where required. The only thing Dimensional Analysis cannot do is give numerical constants such a pi since thes numbers are dimensionless

Answer 3

Speed of sound in dry air is 1130 feet/sec
9minutes = 540 seconds
So 540*1130 = 610,200 feet traveled in 9 minutes

Answer 4

With no calculator or pen at hand to do the math, I think it's a bit over 600,000 feet at sea level, standard STP, but varies considerably according to altitude, humidity, barometric pressure, temperature, etc.

Answer 5

sound speed is 340 m/s,so in 9minutes it will travel
340 * 9 * 60 =183600 m
to change that to feet you have to multiply by 3.28
183600*3.28 = 602208 feet