How does the electrical force relate to the distance between two charged objects? How can an object have negative momentum? An electric field of 4.7 x 104 N/C exerts a force of 0.59 N on a charged object. The force is opposite in direction to the electric field. ...
He repeated the research of Thales of Miletus, rubbing objects together and charging them by friction. When one object attracted or repelled the other, he coined the term "electric" to describe the forces at work. He said these forces developed because the rubbing action removed a fluid, or...
How does friction could help speed up an object? How does the length of a pendulum affect its period? How does momentum affect velocity? How do you calculate the force constant of a spring? How Newton's Laws apply to this situation: a mass suspended from two strings?
He repeated the research of Thales of Miletus, rubbing objects together and charging them by friction. When one object attracted or repelled the other, he coined the term "electric" to describe the forces at work. He said these forces developed because the rubbing action removed a fluid, or...
To prevent friction. As a rule of thumb, it’s recommended to avoid double negatives, such as“Do not unfollow.”However, I’d go further and advise avoiding single negatives as well. The issue is that to decipher such a message, a user has to perform an excessive logical operation: fir...
In all scenarios above, life on Earth would come to an end. Plus, the Earth itself could become a rogue planet. But what’s a rogue planet? It is actually a planet that does notorbita star. The researchers think there are two rogue planets for each star in theMilky Way. Ok, then ...
Relative humidity above 40% does not eliminate static electricity, only allows it to dissipate harmlessly. Source: electronics-notes.comWhy humidity mattersWater is a great conductor of electricity. An electrically charged object will therefore relieve its electric charge when the air is humid, ...
We track ownership in a very fine-grained way. Think, for example, every row in a conventional SQL database or NoSQL database where every object is owned by one of the participants. That maps really well on to most real-world use cases. Let's say, you're taking a...
This ingenious 1959 flywheel system designed by Bertram Schmidt can fold in and out to increase or decrease the energy it stores. How does it work? The driving motor (green, right) powers the load (orange, left) through an axle (yellow) and pulley system (gray). As the speed of the ...
But does the Looj really work as advertised? And what other gutter-cleaning gadgets are out there? What's With the Name? Inventor Jim Lynch chose the name "Looj" for its allusions to the Olympic sport of luge -- both activities involve propelling an object through a narrow track. Plus, ...