In general, an increase in intensity will cause a sensation of increased loudness. But loudness does not increase in direct proportion to intensity. A sound of 50 dB has ten times the intensity of a sound of 40
How does sound going slower in water make it hard to talk to someone underwater? Describe the vibration of an air column in a flute. Why does sound travel slower in cold air than in warm air? What is is called (both terms) when something makes a sound but no one is around to hear...
Because that shockwave of sound moves much more slowly than light does, you will almost always see lightning strike a few seconds before you hear the thunder. This makes them seem like they are different things when actually they are two parts of the same thing. Next time you see lightning,...
How does sound relate to energy?What Is Sound:Sound is a mechanical wave with a longitudinal shape. The vibrations of matter in sound wave trigger hair cells within our ears to send signals to our brain, which we interpret as sound.
64.What does the writer imply about the hypothesis of inflation? A.It hasn’t been challenged. B.It doesn’t make much sense. C.It is by far the most reasonable approach. D.It is the simple version of a complicated id...
We plunge eight hours through elephant grass so tall and thick it’s possible to get lost just 20 feet from the man in front of you—down grass ravines, up hills exposed to the enemy, across a murky, waist-deep pond. At the sound of a twig cracking or the detection of an unexpected...
Q: During turbulence, why does the plane not always change altitude? Sometimes it seems that we fly in a cloud that creates turbulence, and it confuses me why we can’t change altitude. A: Airspaces we fly in are strictly controlled for safety, and if we want to change a flight...
5.So we canrush to make sure they are okay. The same idea applies tohuman screaming. When we hear this sound, we canquickly go to help the screaming person.根据短文内容,从方框中的六个选项中选出能填入空白处的最佳选项。其中有一个是多余选项。A. So they could moreeasily notice the sounds...
There is thunder(有字幕) 551100:37 How many books do you have(有字幕) 427800:33 How much is that coat in the window?(有字幕) 437900:44 This is my cap here(有字幕) 454900:51 How can you help your earth?(有字幕) 417900:37 The Little Indians(有字幕) 542000:55 In my bedroom(有字...
"It's too late! Just sit down and hold on," shouted Toby's dad above the sound of the wind. "Don't be sorry. We can get through it."Just then, lightning (闪电) passed through the air and it started to thunder (打雷). At the same time, hard rain was falling. Waves tossed ...