Knowing that air can propagate sound, a simple experiment was designed to prove that solids can prop

Knowing that air can transmit sound, a simple experiment was designed to prove that solids can transmit sound, and it was required to be written.

Experimental equipment: Desk, experimental process: Keep one ear attached to the table, block the other ear, and let the classmates tap on the table where you can't see it.

Experimental Analysis and Conclusion: If you can hear a knocking sound, it means that the solid (table) can transmit sound.

A cotton thread wears two small bottles, a microphone, and asks two people to talk to each other with a microphone to see if they hear a sound.

Knock on the water or heating pipes on the first floor, and you can hear the sound on the third or fourth floor.

Generally speaking, sound travels faster in the solid than in the air.

a.That's right. b.Mistake.

Correct Answer: a

Put the alarm clock that is ringing in the glass bell jar, and use the extractor to slowly extract the air in the hood, we will hear the alarm clock sound smaller and smaller, and when all the air in the hood is extracted, we will not hear the alarm clock ringing, only see the alarm clock vibrating. Then open the glass bell valve and let the air flow slowly into the hood, and as the air slowly pours in, we hear the alarm clock sound again, and it gets louder and louder until it is back to the same as before. That's it!

The speed of sound depends on the type of medium: sound travels fastest in solids, followed by liquids and slowest in gases

So the answer is: fast

Solid: There is a humming sound when you turn on the faucet, which is the sound of the water hitting the pipe, liquid: When you approach the bank, the fish in the river will swim away, and it is the water that transmits the sound.

Gas: The teacher lectures, you listen below.

Procedure: Two students work together to experiment. Kosheng lifts the tuning fork with one hand and dips it into the tank, and with the other hand hits the tuning fork in the water. Yisheng put on the stethoscope and attached the pickup end to the outer wall of the water tank.

Experimental Phenomenon: When A hit the tuning fork, B heard the sound of striking the tuning fork in the stethoscope.

Conclusion: Water (liquid) is capable of transmitting sound.

Life Experience: Two people dive at the same time, one person makes a buzzing sound and the other person can hear it. If you grew up near the sea, you've probably ever seen fishing. The fishermen lowered the nets and then scurried the fish by striking the side of the boat to make a noise.

Sound can also travel in water.

Experimental verification: After setting an alarm clock and placing it in the water with a bell cover, we can also hear the sound when the alarm clock goes off.

Phenomena in life can also be illustrated, such as clapping your hands in front of the fish tank, and you can see the fish swimming. In fact, talking by the river can also see this situation.

Sound can travel in liquids.