1

Technology / Re: Should games be used to train the military?

« Last post by Rodneyhhernandez on Today at 13:00:11 »

I wouldn't call this games, I think for the military the most beneficial are the simulators.

2

Technology / Re: Which electric motor is best for electric bikes and scooters?

« Last post by Rodneyhhernandez on Today at 12:58:22 »

General answer, smallest and most effective electric motor

3

Just Chat! / Re: Initials grammar...

« Last post by alancalverd on Today at 12:38:56 »

The appearance of penises in Hansard is, I think, rare and very recent. Honorable Members are mostly what that publication would probably call "compulsive masturbators" but, aside from a lust for lewd tractors,  they tend not to parade it in the Chamber.

Any such reference in The Times would be in a medical or court report and thus a statement of fact, not a joke.

4

Physics, Astronomy & Cosmology / Re: Is there a limit to how hot things can get?

« Last post by alancalverd on Today at 12:24:34 »

The spectrum is irrelevant. As long as the source and detector are coupled and isolated from the rest of the universe, heat always and only flows from a hotter body to a cooler one.

If the voltmeter is broken it will show V = 0 all the time. I've skimped on the experimental details a bit because the thermopile needs a cold reference, but you can use ice/water if the fly is at room temperature (that's actually the answer the interviewer was looking for - it's a coldblooded creature!)  so V > 0 and over a short range, directly proportional to Celsius temperature.

There is a good reason  most flies have black bodies: optimum heat exchange to keep the enzymes working and dump waste heat from the muscles.

5

Just Chat! / Re: Initials grammar...

« Last post by Bored chemist on Today at 11:44:58 »

Almost every time I ask a question on this forum you brits find a way to turn it into a penis joke.

You seem to have imagined that.

6

Just Chat! / Re: A Short puzzle with dogs.

« Last post by Bored chemist on Today at 10:59:20 »

What sort of "home" for a dog doesn't provide water?

7

Just Chat! / Re: A Short puzzle with dogs.

« Last post by Petrochemicals on Today at 10:36:43 »

Straight to the dog house and vertically down to the river.

   I guess that might work.   The original problem did ask you to find the shortest route for a thirsty dog to get home.  The dog did get home and it was thirsty.

Best Wishes.

It did, and it is possibly the shortest distance to answer the riddle. Conversely with the dog being thirsty it may be the quickest (shortest duration) for the dog to arrive immediately at the river and then toddle off home as the dog probably will function far better once refreshed.

8

Chemistry / Re: Another light scattering question; colour of an alien sky?

« Last post by Bored chemist on Today at 10:21:44 »

Blue- unless it's cloudy.

9

Technology / Re: Should games be used to train the military?

« Last post by evan_au on Today at 10:05:51 »

On the weekend, I went to an airshow, and the Army was letting members of the public try out their VR helicopter flight simulators - effectively a video game with realistic hand/foot controls.

Judging by the number of people ahead of me in the line who crashed and burned, it's much cheaper to use a game than a real helicopter. (In one case, the apprentice pilot flew straight through a dozen residential homes...)

I was able to take off, fly around a bit, and land (with a lot of help!).

VR_Helicopter_simulator_cropped.jpg (91.38 kB . 720x493 - viewed 17 times)

10

General Science / Re: How to prove scientifically if someone is addicted to cocaine?

« Last post by paul cotter on Today at 08:56:49 »

Very smart idea there, evan_au(why didn't I think of that!). Areas around the ventral tegmental and nucleus accumbens regions where the reward function is located would surely light up. "Addiction" both psychological and physical(ie dependence) to any substance or activity leads to increased expression of the nuclear transcription factor delta phos b which changes neuronal behaviour.