Recent content by kokophysics

Very interesting. Thanks russ!

Thanks for the reply russ. I see your point about the massive flat front of the boat. I thought the same but still doesn't make 100% sense to me. As you said, i would need to see it in a wind tunnel. Anyway, aerodynamics never make sense to me ever since I first learn the Venturi effect. It's...

Hi Naty1! Thanks for your early reply. I have definitely heard about those sails and also have read about cars moving faster than the wind... using the wind as their only source of energy. That's pretty impressive and I have to admit aerodynamics are complicated but I'm not an expert in that...

I recently read this http://www.earthtechling.com/2011/06/wind-turbines-board-europe-ferries/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+Earthtechling+%28EarthTechling%29&utm_content=Google+Reader" and it's really bugging me. They claim that by putting wind turbines on the...

Thanks for answering but i thin'k you're someway wrong. Food get hot in very different intensities in different parts if it doesn't turn, and because of that, there is a turning plate. (And I'm talking about homogeneous food). Actually there is another curious effect. The part touching the...

What's the shape of a microwave beam in a microwave oven? I wonder wether is a ray a small cone, a big cone a band... Does this beam reflects on the inner walls of the microwave or get absorbed? I would say the second one because one side of the food, if it doesn't turn inside the microwave...

Yes, it would be the same. The faster you peddle the faster you gain energy (both potential and cinetic) and you gain energy at the same rate you gain velocity. So the faster you peddle, the faster you will ascend and more energy you will win. But this extra energy you win is ONLY provided by...

I can only say that both electromagnetic waves and gravity fields move at the speed of light. i.e. If the sun suddenly stopped existing, the Earth would begin to get out of its orbit at the the same moment it became dark. (About 8 minutes)

If you don't consider the friction forces and excluding accelerations, the force is not only the same at any cadence, but is 0. Think about Newton's first law.

Once i heard in a documentary that a "program" of the universe could be made made only using the basic variables comprised in it. These are the mass of an electron, the charge of an electron, the gravitational constant... They actually said in that documentary the amount of these variables...

I would say that given the radius of your string, the angular velocity it's limited because w·R < c.