A person blows into open-end of a long pipe. As a result, a high-pressure pulse of air travels down the pipe. When this pulse reaches the other end of the pipe,

Question

A person blows into open-end of a long pipe. As a result, a high-pressure pulse of air travels down the pipe. When this pulse reaches the other end of the pipe, (A) a high-pressure pulse starts travelling up the pipe, if the other end of the pipe is open (B) a low-pressure pulse starts travelling up the pipe, if the other end of the pipe is open (C) a low-pressure pulse starts travelling up the pipe, if the other end of the pipe is closed (D) a high-pressure pulse starts travelling up the pipe, if the other end of the pipe is closed

Tardigrade Admin · Accepted Answer

At open end phase of pressure wave changes by 180°. So, compression returns as rarefaction. At closed end there is no phase change. So, compression returns as compression and rarefaction as rarefaction.

Q. A person blows into open-end of a long pipe. As a result, a high-pressure pulse of air travels down the pipe. When this pulse reaches the other end of the pipe,

a high-pressure pulse starts travelling up the pipe, if the other end of the pipe is open

a low-pressure pulse starts travelling up the pipe, if the other end of the pipe is open

a low-pressure pulse starts travelling up the pipe, if the other end of the pipe is closed

a high-pressure pulse starts travelling up the pipe, if the other end of the pipe is closed

At open end phase of pressure wave changes by 180 $^{\circ}$ . So, compression returns as rarefaction. At closed end there is no phase change. So, compression returns as compression and rarefaction as rarefaction.

Q. A person blows into open-end of a long pipe. As a result, a high-pressure pulse of air travels down the pipe. When this pulse reaches the other end of the pipe,

a high-pressure pulse starts travelling up the pipe, if the other end of the pipe is open

a low-pressure pulse starts travelling up the pipe, if the other end of the pipe is open

a low-pressure pulse starts travelling up the pipe, if the other end of the pipe is closed

a high-pressure pulse starts travelling up the pipe, if the other end of the pipe is closed

At open end phase of pressure wave changes by 180∘. So, compression returns as rarefaction. At closed end there is no phase change. So, compression returns as compression and rarefaction as rarefaction.

At open end phase of pressure wave changes by 180 $^{\circ}$ . So, compression returns as rarefaction. At closed end there is no phase change. So, compression returns as compression and rarefaction as rarefaction.