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 and then closed by a device. While box B is simply closed by a device without sucking air from it. A call is made simultaneously on both the phones, but the ringing sound comes only from box B. This is because:Statement 1: In box B, there are air particles to vibrate and box A 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 and then closed by a device. While box B is simply closed by a device without sucking air from it. A call is made simultaneously on both the phones, but the ringing sound comes only from box B. This is because: Statement 1: In box B, there are air particles to vibrate and box A 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 and then closed by a device. While box B is simply closed by a device without sucking air from it. A call is made simultaneously on both the phones, but the ringing sound comes only from box B. This is because:Statement 1: In box B, there are air particles to vibrate and box A 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 and then closed by a device. While box B is simply closed by a device without sucking air from it. A call is made simultaneously on both the phones, but the ringing sound comes only from box B. This is because:

Statement 1: In box B, there are air particles to vibrate and box A is a vacuum.

Statement 2: Sound needs a medium for propagation.

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