There are two boxes A & B. Cell phones are kept in both the boxes, all

1.	There are two boxes A & B. Cell phones are kept in both the boxes, all air is sucked from box A which is then closed. While box B is simply closed without sucking air from it. A call is made simultaneously on both the phones, but sound comes only from box B. This is because: Statement 1: In box B there are air particles to vibrate but in box A there is a vacuum. Statement 2: Sound needs a medium for propagation.
Answer» There are two boxes A & B. Cell phones are kept in both the boxes, all air is sucked from box A which is then closed. While box B is simply closed without sucking air from it. A call is made simultaneously on both the phones, but sound comes only from box B. This is because: Statement 1: In box B there are air particles to vibrate but in box A there is a vacuum. Statement 2: Sound needs a medium for propagation.

There are two boxes A & B. Cell phones are kept in both the boxes, all air is sucked from box A which is then closed. While box B is simply closed without sucking air from it. A call is made simultaneously on both the phones, but sound comes only from box B. This is because: Statement 1: In box B there are air particles to vibrate but in box A there is a vacuum. Statement 2: Sound needs a medium for propagation.

Answer»

There are two boxes A & B. Cell phones are kept in both the boxes, all air is sucked from box A which is then closed. While box B is simply closed without sucking air from it. A call is made simultaneously on both the phones, but sound comes only from box B. This is because:

Statement 1: In box B there are air particles to vibrate but in box A there is a vacuum.
Statement 2: Sound needs a medium for propagation.

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