Before we had technology, the original method to calculate the mass of astronomical objects like Earth or the moon, was a stick and a string. Here's how this works:
It involves calculating some very, very tiny numbers in order to find some super huge big ones.
30. It's really cool, so I'm going to explain how it works.Let's go over this gravitational force model. First, the magnitude of this force depends on the product of the two masses interacting (m2we have better methods nowthe Greeks did a pretty nice job figuring this out
Let's start with a simple physics demo that you can try at home. Take a pencil and place it on the edge of a table so that about half of the pencil is hanging over the edge and it's almost about to fall over (but it doesn't). At this point, the pencil is mostly balancing right on the edge of the table. With only this tiny contact point supporting the pencil, the frictional force can't really exert any torque to stop it from rotating. Even a super tiny force pushing the end of the pencil will get it to rotate. Try a tiny puff of air from your mouth to get it to rotate.Read more: WIRED »
Biden Signs Historical Bipartisan Gun Measure, Says ‘Lives Will Be Saved'
President Biden signed a bipartisan gun measure on Saturday, saying “Time is of the essence. Lives will be saved.” Most of its $13 billion cost will help bolster mental health programs and aid schools. Read more >>
Figure at center of pro-Trump Jan. 6 theories to speak with select committee FridayRay Epps, a former Arizona Oath Keeper at the center of pro-Trump conspiracy theories related to Jan. 6., intends to sit for a transcribed interview with the select committee investigating the attack on the Capitol It would help if everyone knew who the oathkeepers really are. RepKinzinger
‘Central figure’: Rep. Schiff on Jan. 6 committee subpoenaing Rudy GiulianiRep. Adam Schiff on the Giuliani subpoena: “There’s a lot he could tell our committee, certainly a lot we’ve uncovered already. But I think he is a pretty central figure in all of this.” He will dance circles around the committee, making them look stupid. Rudy’s been incognito for some time now. Time away doesn’t make crimes for away. There’s no better argument than to vote for the Democratic Party to save America from being GUTTED of all your Civil Rights from the 'SWIM AT YOUR OWN RISK REPUBLICANS!' The payback is coming this November so prepare to vote for Life, Liberty, and the Pursuit of Happiness!🙂🇺🇸💪
Q&A: Anchorage figure skater Keegan Messing heads to the Olympics at the top of his gameMessing recently won his first Canadian national championship. He shares thoughts on his recent success, becoming a father and the upcoming games in Beijing.
Navy Veteran Had Stroke In Costa Rica, And Now He's Stranded As Family Tries To Pay Five-Figure Medical BillsA Wauconda woman is fighting to get her dad home after he suffered a stroke in Costa Rica – and the family says the hospital there wants them to pay tens of thousands of dollars in medical bills before they will release him.
Inside the toxic world of Britney Spears' family from freeze outs to fall outsFollowing her little sister releasing a tell-all memoir, Britney Spears has found her family feuds and strained relationships with her relatives pushed into the spotlight once again
Huge Project Is Now Underway to Sequence The Genome of Every Complex Species on EarthThe Earth Biogenome Project, a global consortium that aims to sequence the genomes of all complex life on earth (some 1.8 million described species) in ten years, is ramping up. Hi, I am a structural engineer from Iran who have many ideas. I have summarized some of my ideas on my twitter(I suggest look at the idea of generating electricity by gravity). I want to work with companies and investors. Do you want to cooperate?