mariah0399 mariah0399

29-03-2017
Physics

contestada

A boy drops a 0.10 kg stone down a 150 m well and listens for the echo. The air temperature is 20°C. How long after the stone is dropped will the boy hear the echo? The speed of sound through air at 20°C is v = 343 m/s.

Respuesta :

MohammadHaisam MohammadHaisam

29-03-2017

Use formula for Echo which is Velocity=2(Distance)/time so 343=2(150)/T 343T=300..T=300/343=0.9 seconds

Answer Link

Otras preguntas

Two boys are throwing a baseball back and forth. The ball is 4 ft above the ground when it leaves one child’s hand with an upward velocity of 36 ft/s. If accele

“The New Deal led to the economic recovery of the USA in the 1930s.” How far do you agree with this interpretation? Explain your answer.

Which sentence correctly uses the word "so"? A. Our seats were just perfect, so was the concert. B. The bus was late, so we walked to the station to catch the t

Globulin is a protein. Which of the following organelles will assist in the synthesis of globulin?

Why was Charleston an important city to the South? It was an important railroad depot. It housed most of the Southern army. It was a port city for shipping. It

Find the surface area of th prism. Draw and label a rectangular prism that has a surface area of 96 square meters.

President Andrew Johnson's plan for Reconstruction included what two points? Newly freed slaves would be given full citizenship rights. Southern states would be

When you catch a cold, it is most likely you contracted it from _____. a pathogen rickettsia fleas mites

The dark, smooth surface areas of the Moon are known as A. highlands. B. maria. C. craters. D. rilles.

How would an increase in nest sites affect a population of pigeons? AThe population would decrease. BThe population would increase. CThe population would remain