Sound travels through air at 343 m/s at 20 °C. A bat emits an ultrasonic squeak and hears the echo 0.05 second later . How far away was the object that reflected it?

Distance of the object is 8.6 m

Explanation:

As we know that the speed of sound at t degree C is given as

here we know that the temperature is

t = 20 degree C

so we have

now we know that bat heard the echo of sound in 0.05 s

so the to and fro distance of the object is d + d = 2d

so we have

with the invention of the automobile, the woman of the house could drive to the store and get groceries. women were also free to socialize more. during world war ii women were allowed to work in factories to the war effort and could drive to work or ride mass transit buses to their jobs.

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this