Physics Facts & Trivia

A rubber band shrinks when heated and expands when cooled because of the change in its Entropy state. Submitted by: Emily (Awesome) - Helena, Montana, United States

   Due to the effect of Thermal Expansion, the Eiffel Tower is upto 15cm taller in summer. Submitted by: Muhaimin Mareum Khan - Dhaka, Bangladesh

   If an atom were the size of a stadium, its electrons would be as small as bees. Submitted by: Cathy - Manchester, England, United Kingdom

   Laser is an abbreviation of Light Amplification by Stimulated Emission of Radiation. Submitted by: Hyde - Toronto, Ontario, Canada

   Light does not age. Submitted by: Natalie - New York City, NY, United States

   At 25, Physicist Lawrence Bragg is the youngest person to receive a Nobel Prize. Submitted by: Noha - Egypt

   Atom is over 99.9% empty space. Submitted by: John - Australia

   The most powerful lasers are made with Neodymium-doped Yttrium crystals. In a fraction of a second, they produce more power than the whole United States. Submitted by: Moi - Toronto, Canada

   Sunlight exerts pressure (solar radiation pressure). Submitted by: Hemant - India

   The effect of Relativity made Astronaut Sergei Avdeyev a fraction of a second younger upon his return to Earth after 747 days in space. Submitted by: Moi - Canada

   The Dead Sea is so dense with salt, you can easily float on it without drowning. Submitted by: Ankita Lalwani - Dubai, United Arab Emirates.

   Lake Baikal in Russia contains more water than all the North American Great Lakes 

combined.

   The world's densest wood, the Black Ironwood (Olea laurifolia), does not float on water and therefore sinks. Submitted by: Sruthi R - Coimbatore, India

   The mass of our entire atmosphere is estimated to be some 5.5 quadrillion tons (55 followed by 14 zeros). Submitted by: Sruthi R - Coimbatore, India

   The diameter of a proton is approximately 0.000000000001mm (1/25,000,000,000,000in). 

   The amount of water beneath our ground soil is 50 times as much as all the water in the rivers and lakes combined. 

 

   The lightning bolt is 3 times hotter than the Sun. Submitted by: Jieian

On average, our bodies constantly resist an atmospheric pressure of about 1kg per square cm.

http://www.sciensational.com/physics.html

Astronomy Facts

Even though man has studied the heavens for thousands of years, we still know very little about the Universe we live in. And as we continue to learn more, we are consistently amazed, and sometimes confused, by what we learn. Here is a collection of amazing, interesting, and strange astronomy facts, in no particular order.

• Scientists believe that we can only see about 5% of the matter in the Universe. The rest is made up of invisible matter (called Dark Matter) and a mysterious form of energy known as Dark Energy. 

• Neutron stars are so dense, that a soup can full of neutron star material would have more mass than the Moon.

• The Sun produces so much energy, that every second the core releases the equivalent of 100 billion nuclear bombs.

• Galileo Galilei is often incorrectly credited with the invention of the telescope. Instead, historians now believe the Dutch eyeglass maker Johannes Lippershey as its creator. Galileo was, however, probably the first to use the device to study the heavens.

• Black Holes are so dense, and produce such intense gravity, that even light can not escape. Theoretical physicists predict that there are situations under which light can escape (which is called Hawking radiation).

• Light from distant stars and galaxies takes so long to reach us, that we are actually seeing objects as they appeared hundreds, thousands or even millions of years ago. So, as we look up at the sky, we are really looking back in time.

• The Crab Nebula was produced by a supernova explosion in 1054 A.D. The Chinese and Arab astronomers at the time noted that the explosion was so bright, that it was visible during the day, and lit up the night sky for months.

• Shooting stars are usually just tiny dust particles falling through our atmosphere. Comets sometimes pass through Earth’s orbit, leaving trails of dust behind. Then as Earth plows through the dust in its path, the particles heat up, creating the streaks in the night sky.

• Even though Mercury is the closest planet to the Sun, temperatures can reach -280 degrees F. Why? Since Mercury has almost no atmosphere, there is nothing to trap heat near the surface. So, the dark side of Mercury (the side facing away from the Sun) is very cold.

Venus is considerably hotter than Mercury, even though it is further away from the Sun. The thickness of Venus’ atmosphere traps heat near the surface of the planet.


 http://space.about.com/od/humor/a/AstronomyFacts.htm

Earth's circumference

The Earth’s circumference – the distance around the equator – is 40,075 kilometers around. That’s sounded nice and simple, but the question is actually more complicated than that. The circumference changes depending on where you measure it. The Earth’s meridional circumference is 40,008 km, and its average circumference is 40,041 km.
Why are there different numbers for the Earth’s circumference? It happens because the Earth is spinning. Think about what happens when you spin around holding a ball on a string. Your rotation creates a force that holds the ball out on the end of the string. And if the string broke, the ball would fly away. Even though the Earth is a solid ball of rock and metal, its rotation causes it to flatten out slightly, bulging at the equator.
That bulge isn’t very much, but when you subtract the meridional circumference (the equator when you pass through both poles), and the equatorial circumference, you see that it’s a difference of 67 km. In other words, if you drove your car around the equator of the Earth, you would drive an extra 67 km than you would if you drove from pole to pole to pole.
And that’s why the average circumference of Earth is 40,041 km. Which answer is correct? It depends on how accurate you want to be with your calculation.

http://www.universetoday.com/40958/earths-circumference/

WELCOME

Hello and Welcome everyone... 

The purpose of the making of this blog is to provide everyone with some amazing facts or something unique/ incredible that maybe some of you haven't know yet. The information that you get here might be a re-post from other site, and of course we will give the link to the original site

Well then, enjoy

GROUP: KARIM, MICHAEL T, DAVIN

P.s: sometimes i'll post something related to my interest also hehehe......