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Let’s say ufos are real, is there any advantage the saucers are more aerodynamic than conventional rocket/aircraft designs in the earths atmosphere and seeing there isn’t any air resistance in...
Erectile disfunction is a symptom of testosterone deficiency, but is it common to have a testosterone deficiency and have trouble developing secondary sex characteristics (such as getting a deeper...
https://youtu.be/2-BLz4pfrHU Why am I so turned on by girls who can do this? I mean scientifically why does this make me sexually aroused? There’s clearly nothing sexual about it. This is a serious...
I keep reading on scientific websites that we don't know what 95% of the universe is made from? Its all atoms isn't it? What is this thing about anti-matter? Can you explain it to me in laymens terms?...
I have a Morphy Richards breadmaker about 20 years old that's still going strong. The body of the breadmaker is sheet metal but the lid is made of a rather peculiar type of white plastic. that seems...
Might seem an odd category to put it in but bare with me. Money is what makes the modern human society tick over. So when did Homo Sapiens introduce 'money' as a means of survival? Just when did...
What element accounts for arond 65% of the human body? Calcium, hydrogen or oxygen. Now we know that the body is 60-70% water and water is H2O ie 2 Hydrogen atoms to 1 oxygen right? So the answer must...
UV 2 is benign, UV 4 begs sun cream, UV 6 requires respect, but is the scale linear (like Volts), logarithmic (like dB or Richter), linear with an offset base (like Celsius or British dress sizes);...
At 10 000 m altitude a balloon is cold, but a meteor is hot. What would be the temperature of the nose of an aircraft flying at (say) 600 km/h? Ignore conduction and radiation, or masochists can...
Did you know that the time on the International Space Station is set to Greenwich Mean Time, the same as UK time. They were originally going to use the time in Houston, Texas which is GMT -5. But the...
CNN's courageous (i.e. totally conventional) reporter Christiane Amanpour (didn't you love her on Brexit night?) discussing a real woman. Fans of the Listener will know Ms Lamarr because she was a...
Just watched this video (below).
A bit mind boggling but very interesting. Just wanted to know how widely accepted this idea is among physicists? Or is it a fringe science kind of thing?
Thanks....
Ball A, with a mass of 20 kg, is moving to the right at 20 m/s. At what velocity should Ball B, with a mass of 40 kg, move so that they both come to a standstill upon collision? How do I solve this?...
So how do I lay this last problem out? Ball A, with a mass of 10kg, is moving to the right at 20 m/s. Ball B is moving to the left at 20 m/s. Upon collision, Ball B comes to a standstill, and Ball A...
Ball B, with a mass of 30kg, is moving to the left at 10 m/s. With what velocity should Ball A, with a mass of 10kg, move to the right and collide with 2, so that ball A rebounds with a velocity of 30...
Practical instruction Although woodlice often respond to gradients of light, temperature and humidity, it is self-evident that these responses do not account for their behaviour in the wild. An...