首页>英语角 > 听力 > 美音 > 课 程 > 科学 > 初三>How To Float A Ping Pong Ball In The Air
How To Float A Ping Pong Ball In The Air
Question
The ball falls down
提交
00:00
00:00
播放重放快退快进
How To Float A Ping Pong Ball In The Air
音量
The aim of this experiment is to make a ping pong ball float in the air
Plug in a hair dryer and turn it on.Hold the hairdryer so that its nozzle is pointing upwards and place the ping pong ball in the airflow. The ping pong ball hovers over the hairdryer.
Why did this happen?The pressure inside the stream of air generated by the hairdryer was lower than the air swirling around it. This surrounding air pushed on all sides of the ball, which held it inside the hairdryer air stream.Gravity stopped the ball from flying straight up into the air.When hairdryer is tipped to a certain point the ball falls down. This is the point at which gravity was exerts a greater force on the ball than the air pressure does.A similar effect can be produced with a straw and a malteser. Place the malteser on the straw, and blow.Experiment Complete!
视频文本已隐藏,本文本来自网络或网友仅供参考
显示视频文本

Discuss

0 comments
characters remainingSubmit
反馈