+- +-


Welcome, Guest.
Please login or register.
Forgot your password?

+-Stats ezBlock

Total Members: 51
New This Month: 0
New This Week: 0
New Today: 0
Total Posts: 15714
Total Topics: 267
Most Online Today: 2
Most Online Ever: 201
(December 08, 2019, 11:34:38 pm)
Users Online
Members: 0
Guests: 0
Total: 0

Author Topic: Science  (Read 5638 times)

0 Members and 0 Guests are viewing this topic.


  • Administrator
  • Hero Member
  • *****
  • Posts: 32501
  • Location: Colchester, Vermont
    • Renwable Revolution
Re: Science
« Reply #105 on: July 05, 2019, 06:45:35 pm »
Is the Speed of Sound Constant?

The speed of light is a constant, always traveling at the rate of 186,000 miles (300,000 km) per second. The speed of sound, on the other hand, is much more fickle. For example, sound waves move at 761.2 miles per hour (1,225 km/h) at sea level when the air temperature is 59 degrees F (15 degrees C).

However, heat up the air and they move faster; cool the air, and they slow down.

That's why breaking the sound barrier high in the sky is relatively easy: Temperatures are colder, so a lower speed will do the job.

Interestingly, sound moves very quickly under water, where the molecules are much denser than they are in the air. Their density means that they bump into one another more quickly, which is how sound travels. Sound travels through water at approximately 4,856 feet per second (1,480 meters/sec) -- more than four times faster than its speed through the 💨 air. But because the molecules are denser in water, sound needs more energy (ie. loudness) -- to get moving. That's why faint sounds can't be heard under water like they can above it.

Sounds interesting:

► Sound doesn't exist in space because there aren't any molecules for it to travel through.
► The greatest sound ever recorded 💥 was the eruption of the Krakatoa volcano in 1883. The explosion could be heard 3,000 miles (4,828 km) away.

► A whip's snap is the sound of the tip breaking the sound barrier.


Rob not the poor, because he is poor: neither oppress the afflicted in the gate:
For the Lord will plead their cause, and spoil the soul of those that spoiled them. Pr. 22:22-23


+-Recent Topics

Creeping Police State by AGelbert
March 29, 2020, 10:38:23 pm

🚩 Global Climate Chaos ☠️ by AGelbert
March 29, 2020, 09:40:27 pm

Animal Homes by AGelbert
March 29, 2020, 08:17:28 pm

New Pandemic? by AGelbert
March 29, 2020, 05:28:43 pm

Money by AGelbert
March 29, 2020, 04:28:57 pm

The Big Picture of Renewable Energy Growth by AGelbert
March 29, 2020, 04:07:52 pm

Defending Wildlife by AGelbert
March 29, 2020, 03:37:42 pm

Doomstead Diner Daily by AGelbert
March 29, 2020, 03:16:18 pm

Comic Relief by Surly1
March 29, 2020, 10:06:24 am

Corruption in Government by AGelbert
March 28, 2020, 07:00:07 pm