General Science / Re: history assignment help« on: 20/12/2021 08:21:18 »
Sorry mate, but all spammers are history on this forum
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boppity boppity time.Is that a medical term?
Great stuff this spam. So, do you eat it or just smear it all over??
I adore the proper, 90% cocoa, dark unadulterated stuffIt has the advantage that you can leave it on your desk and nobody nicks it (well, not twice, anyway).
Couldn't we find a use for the knotweed - such as feeding livestock on our farms, or making paper and cardboard from it?If it was good for something, it would be a crop rather than a weed.
...... it doesn't explain the mechanism of its appearance, which I am eager to know...This is a guess, but it looks as though the soft clay has been lying on a bed of pebbles.
Can you give me the gentler version first to get me started please?Particles like balls also obey angle of incidence = angle of reflection (if you ignore gravity, and the fact that balls tend to start spinning when they run into things). At least snooker gets around the gravity problem....
the bit about waves cancelling each other out has got me confused.A moving wave front can be modeled as a new wave radiating from every point on the wave front. This myriad of point sources cancels out everywhere except for the solution where the wave moves ahead. This effect can be seen in the classic double-slit experiment, where both slits effectively become a point source of radiating waves.
Very good point about the amount of available coastline!OK, let's iron out a few variables. Suppose the weather is nonexistent and the water is mirror calm all over the Earth. All the people are already at the shore but waiting, so their gravity isn't going to change much by a small amount of motion. We remove the moon so tides go away. Can't measure a micron of sea level if it's boinging up and down with the tides.
But wouldn't the rate at which people were getting into the water be slower than the rate of water redistribution?
Also, presumably bringing all that mass close to the seashore would depress the land there a bit, so sea level would apparently rise (by a picometre or so?), and all the gravity associated with those people would pull up the water more, making a further apparent rise, surely?
OK, any idea what the range of 60 GHz sound waves is in blood?Maybe they should try sound waves of a frequency which would destroy the virus.OK, obviously that would need to be quite a high power density.
What frequencies did you have in mind?
Remember- it has to be a frequency that's not absorbed by human tissue or you will kill the patient, rather than the virus.
I was thinking of taking the blood out through a tube and back in and using the sound on the blood passing through the tube.
Some research here https://www.livescience.com/7472-kill-viruses-shake-death.html