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Logic 101

I'm currently engaged in a debate over whether disbelief is the same as lack of belief. I'm hoping there are a few logic and reasoning professors who would be willing to chime in. Thanks in advance!

Vanderburgh County Indiana science education science logic modeling Posted over 2 years ago

Mars And Venus Changing Worlds Through Hypothetical Technology

What would happen if we could implant a moon around both Mars and Venus, if we had the technology to do so. Also What would happen if we could place artificial magnetic fields, similar to Earth, but designed for each planet, around each?

Wayne County Tennessee technology science astronomy Posted about 3 years ago

Ancient Civilization on Mars?

Hello
I'm writing a story. I'm curious if it is preposterous to suggest an ancient civilization on Mars. I'm curious about a civilization being wiped out. A civilization that maybe got as far as us now or even to the time of the ancient Egyptians.

Is it possible for all traces to be wiped out where we could still discover some sort of evidence? Or is there empirical evidence that it is impossible? I'm happy to say that it was 50million or even a billion years ago. Would it be obvious to us now if there was once a civilization? Or can everything get washed away by erosion? Would maybe solid gold or canals or structures survive maybe?

Thanks so much in advance - I'm trying to keep my manuscript a bit reasonable.
Mike


DuPage County Illinois science education Posted about 3 years ago

Big Bang Theory

According to the Big Bang theory the universe is still expanding, my question is where does it get heat to expand as expansion needs heat?

Outside United States science education Posted about 3 years ago

What kind of diagram/chart is this?

Hi,

I have made a diagram which shows how many of the respondents that answered x on question a, also answered y on question b.

My first thought is that it is a Venn Diagram or Euler diagram, but my diagram does not show: Those who have answered x on question a, but not answered y on question b.

Please take a look at the diagram I have attached.


Any idea of what this type of diagram is called?

Thank you!



Posted about 3 years ago

Geology

Which is typically associated with rhyolitic magma?

Vanderburgh County Indiana science education Posted almost 4 years ago

What would be a good science fair project to do about genetically modified plants

I am a seventh grade student. I decided to do my science fair project on variations between genetically modified and non-modified plants because of the evidence of the growing health risks caused by GM foods. I was going to do a project about whether fruit flies are more attracted to organic fruits or genetically modified fruits. I was wondering about the variables I would need to consider about the fruit flies and the fruit. Here are some of the questions I had to consider: What fruits would be the best to use? What kinds of fruit flies would I use? Where would I keep them? At what temperature would be the best to place the fruit flies?

Allegheny County Pennsylvania science education science fruit flies Posted almost 4 years ago

Ammonia gas

how many cubic feet of ammonia gas in a liter of ammonium hydroxide If the ammonium hydroxide is 28 percent by weight.

Cook County Illinois science education Posted over 4 years ago

Why do X-ray machines require large guage copper wire and cannot use aluminum.

X-ray machines commonly take line power (i.e. 240 volt single phase), rectify it to DC {this involves clipping of the tops of the classic sine wave and feeding it into a capacitor bank}, Taking this DC power through an inverter to a high frequency AC signal that is feed into a modern small high efficiency transformer to a high voltage (125 killovolts) feed to the x ray tube itself. A typical X-ray has a momentary draw of 150 amps at 240 volts but for a few milliseconds during rectification the draw will be several hundred amps and 0 amps for most of the cycle { most of the cycle will be below the voltage stored in the capacitor bank} . Manufacturers specify all wire to be copper: they claim aluminum reacts to the harmonics and produces interference or chatter that disturbs the electronics in the system. Aside from resistance differences what properties of aluminum create chatter. Aluminum has about twice the thermoelectric effects of other metals but what is the problem as a conductor. The other mystery is why can the utilty company use a small guage aluminum wire to the meter then according to manufacturer's specifications a giant wire (i.e. 2/0 copper) up to the box by the machine where suddenly it's OK to use a wire guage 4 sizes smaller for 12 feet from the box (power disconnect) to the machine. Their explaination is induction but it defies common sense to use a very small wire for the first 10% of the total run and for the last 10% and a giant wire in between. All manufacturers require this so what is the science behind it?

Monmouth County New Jersey science education technology engineering Posted over 5 years ago