-
-- 2622 - NANOTECHNOLOGY - solar cells from nanowires? Energy is the number one problem we will face in the next few decades. This year the world uses 14,500,000,000,000 watts of power. Most of this energy is generated using gas and oil. Only 1 % of our energy comes from solar, wind, or geothermal. In the year 2050 we will be using somewhere at least 30,000,000,000,000 watts of electricity.
-
- 2623 - - NANOTUBE - how to build a radio? A whole new radio has been invented using nanotechnology. The radio is so small it cannot be seen without the aid of a microscope. The radio is a single carbon nanotube that is much smaller than a wavelength of light.
-
- 2624 - GOVERNMENT - How much does the government spend and where does the m My ie handles the family budget. I worry about the big things.-
-
- 2625 - EULER’S FORMULA - Topology for 6th Graders ? Euler’s formula applies to all types of solids and surfaces and it is not always equal to 2. A different equation will define a different type of solid. Let’s take a donut for example. This category of shape is called a “torus”, but the donut is more familiar. -
-
- 2626 - CALENDAR - why 7 days, and daylight savings? Alexander the Great shifted to the seven-day week. I Emperor Constantine who decreed that the seven-day week was the official Roman week and made Sunday a public holiday in A.D. 321. One hundred years ago Congress passed the first daylight saving legislation.-
-
- 2627 - ASTEROID - to hit Mother Earth. It is not an if, it is a when. Astronomers are tracking Near Earth Asteroids, NEAs. There are many, and each one needs to be identified with an orbit trajectory to learn if it will be a threat. OK, let’s just say they see one coming right at us. What then?-
- 2628 - GRAVITY WAVES - from supernovae explosions? Is the speed of gravity instantaneous, or is there a speed limit on how fast the force of gravity can travel. This is not as simple a question. After all, we know how fast light travels, and if the Sun were to suddenly wink out of existence, we’d still receive light from it for just over 8 minutes after it disappeared!-
-
- 2629 - GALAXIES - how do they form and grow? Astronomers don’t yet fully understand how those original massive stars themselves are initially formed. So far, observations have only yielded some pieces of the puzzle. This is because nearly all the known massive stars in our galaxy are located very far away from our solar system. They also form in close proximity to other massive stars, making it difficult to study the environment where they take shape.-
-
- 2630 - OLBERS PARADOX - why is the sky dark? - Olbers' paradox, named after the German astronomer Heinrich Wilhelm Olbers (1758–1840), also known as the "dark night sky paradox", is the argument that the darkness of the night sky conflicts with the assumption of an infinite and static universe. -
-
- 2631 - DARK MATTER - dark coffee would help? Astronomer’s observations have determined the average density of matter in our universe to very high precision. But this density turns out to be much greater than can be accounted for with “ordinary atoms“. Is there some other matter that we still don’t know about?-
-
- 2632 - DARK ENERGY - some form of anti-gravity? - Is dark energy the “cosmological constant“. The fact that we see the Universe expanding as it does means that there must be some new form of energy causing these distant galaxies to recede from us faster and faster as time goes on.-
-
- 2633 - METEORS - we call them shooting stars. How four small pieces of rock can teach us about the history of the solar system. The first is a meteor from outer space that hurtled through the atmosphere of a bright, blue planet to land upon a world populated by strange, multi-tentacled creatures.
-
-----------------------------------------------------------------------------------------
----- Comments appreciated and Pass it on to whomever is interested. ----
--- Some reviews are at: -------------- http://jdetrick.blogspot.com -----
-- email feedback, corrections, request for copies or Index of all reviews
--- to: ------ jamesdetrick@comcast.net ------ “Jim Detrick” -----------
- https://plus.google.com/u/0/ -- www.facebook.com -- www.twitter.com
--------------------- Wednesday, February 26, 2020 -------------------------
-----------------------------------------------------------------------------------------
No comments:
Post a Comment