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General Science / Get real SPAM and a ban FOR FREE!
« on: 08/08/2019 12:25:40 »
SPAM, SPAM, SPAM, SPAM BEANS AND EGG!
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Hi, everyone I'm new for this place. I'm here to share my views and opinion to all of you.Poor attempt to advertise your food delivery service.
Well, by profession I'm CEO of spamcommerciallink.com.
Ironic that there should be spam in a link about healthy eating...Hope we are not being corny here.
And if there are outbreaks in some areas hopefully, the experience there will influence other areas to get vaccination rates up to the minimum levels.It hasn't yet...
we can try to prevent spread through schools - for example, by requiring vaccination before kids go to school or pre-schoolI rather like the meme that says "If my kid can't take nuts to school, your kid shouldn't be allowed to take measles".
I was asked on the radio this week "how much does the Earth weigh?"Assuming a constant density, Mass goes up by the cube of the radius, and since acceleration due to gravity decreases by the square the distance, surface gravity would increase at the same rate as the radius.
More accurately, we were of course discussing the mass of the Earth, and the answer, which I happened to know, is about 6 x 1024kg.
Later, driving to work, I began to think - as you do - what I would have said if the questioner had enquired instead about the mass of the Moon.
Naively, I reasoned that gravity is about 20% of that felt on the Earth's surface, so the Moon must have a mass 20% that of Earth.
Intrigued, I later looked it up. The stated mass of the Moon is about 7 x 1022kg. That's only about 1% of the mass of the Earth.
Is the acceleration due to gravity on the lunar surface as large as it is (almost 20% of the Earth's despite the lunar mass being only 1% of Earth mass) because the Moon is correspondingly smaller, so the inverse square law being what it is (GmM/r2) it works out that way?
Lazily, I've not done the maths to check...
Further to the point form @Colin2B I've seen water features at a local garden centre that comprise what I presume to be an acoustic mist generator. ....Yes, it is. Water is often passed over a vibrating plate which break up the water into fine droplets, often the same system is used in household humidifiers.
Why do office chair always have five wheels?
I'm fed up banging my heels.