Question

Через какое время человек услышит эхо ,если расстояние до преграды 170 м, а скорость звука в воздухе 340 м\с?Помогите плиииз!)Очень срочно надо :(((((((((

Answer 1

L=170 м 

V = 340 м/c

L*2 это полное расстояние т.е. от человека до преграды + такое же расстояние до человека от преграды 

t=L*2/v=170*2/340=1 cекунда

Answer 2

Рассуди логически, звук сначало идет до преграды, потом обратно, тоесть он проходит 340м , а скорость звука 340м/c, значит через 1 секунду

Answer 3

Calculation of the Time for Echo to be Heard

To calculate the time it takes for a person to hear an echo, we need to consider the distance to the obstacle and the speed of sound in the air.

Given: - Distance to the obstacle (d) = 170 m - Speed of sound in air (v) = 340 m/s

The time it takes for the sound to reach the obstacle and bounce back (round trip) can be calculated using the formula:

Time = Distance / Speed

In this case, the distance is twice the distance to the obstacle because the sound needs to travel to the obstacle and then back to the person. Therefore, the total distance is 2 * 170 m = 340 m.

Substituting the values into the formula, we get:

Time = 340 m / 340 m/s = 1 second

Therefore, it would take approximately 1 second for a person to hear the echo if the distance to the obstacle is 170 m and the speed of sound in the air is 340 m/s.

Please note that this calculation assumes ideal conditions and does not take into account factors such as air temperature, humidity, and wind, which can affect the speed of sound.