plz help-.A student heard the echo of her voice from nearby solid object after 2 sec. how far away is the solid object? The speed of soun

Question

plz help…..A student heard the echo of her voice from nearby solid object after 2 sec. how far away is the solid object? The speed of sound in air is 340m/s.

A. 170m

B. 340m

C. 510m

D. 680m

​

in progress 0
Thanh Hà 3 years 2021-08-24T16:42:00+00:00 1 Answers 6 views 0

Answers ( )

  1. thongdat2
    0
    2021-08-24T16:43:16+00:00
    Reply

    Answer:

    B.

    340meters per second x 2 seconds = 680 meters away

    divided by 2coming back = 340

    Hope this helps

    Explanation:

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )