Recent comments in /f/explainlikeimfive

Target880 t1_iuhpljf wrote

Reply to comment by bringthelight2 in ELI5 On the first day of fall does the sun take the same route through the sky everywhere? by bringthelight2

On the north pole, there is only south, the is no east-west or north. Talk instead of what latitude line the sun is over.

For any 12 hours period, the sun will move 180 degrees The angular speed of the sun is 15 degrees per hour regardless of where on earth you and what time of year. The sun's angular movement is a result of earth's rotation and it orbits around the sun, not the location on earth

Technically it changes a tiny amount because the time between two solar noons are 24 hours +-30s because the orbit is the ecliptic. The rate it move close to the horiont changes a bit to because of atmospheric refraction.

But the general idea of the angular speed of the sun in the sky is very close to 15 degrees per out is very close to correct for any location and day on earth, That is when the sun is in the sky.

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ShalmaneserIII t1_iuhounz wrote

Reply to comment by TonyR600 in ELI5 How did knights participate in tournaments like jousting without killing themselves? by QuantumHamster

> What stops me from putting my wooden stick to his head, killing him and claiming it was an accident

His equally well-armed and armored friends, probably.

These were a bit of a rowdy bunch. Think biker gangs getting riled up and you can imagine how your "oops" is going to get you killed anyhow.

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Target880 t1_iuhotyr wrote

Reply to comment by ekkidee in ELI5 On the first day of fall does the sun take the same route through the sky everywhere? by bringthelight2

The sun will move in a line very close to a line from due east to due west, directly overhead. It is "close to" not "exactly in".

The problem is the equinox is a moment in time it is not a day. If you look at https://en.wikipedia.org/wiki/Equinox you can see the time was in March 20 15:33 UTC and on September 23 is was 01:04 UTC, those time are rounded to minutes. The day of the equinox is the day it occurs not that is during the whole day.

So it is only one moment in time the equator is in line with the ecliptic.

If we assume the rate of change of axial tilt is constant we can calculate the cage during the day, I believe this is an approximation because of the elliptic orbit of Earth but it is a good enough approximation for my point.

The change in a year is 4 x 23.4 degrees = 93.6 degrees. Per day it is 93.6/365 =0.27 degrees. So on the day of the equnox the sun is up close to 12 hours and the equator change relative to the ecliptic is 0.27/2 =0.135 degrees.

So during the time the sun is up on the day of the equinox, the equator will change its tilt relative to the ecliptic by around 0.14 degrees. So even if the sunrise is exactly due west it will set a small bit off due west. The difference can be even higher because for half of the equator it will be night when the equinox occurs so will be off it even before the day start or before depending on you relative direction, let's double the error and ger a max error of around 0.3 degrees

So if due east and due west mean within 0.3 degrees then the sunrise and sunset direction are correct. If it is 0 error then it is only one spot on earth it is true for sunset and one for sunrise, the spots when the events are on the moment of the equinox.

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askewboka t1_iuhnjbq wrote

Reply to comment by charlesfire in ELI5 How did knights participate in tournaments like jousting without killing themselves? by QuantumHamster

Actually, boxing gloves allow for numerous concussions to occur prior to an actual victory.

In boxing they also have a 3 knockdown rule which is hilarious. Boxing gloves have so much padding and the boxers are so strong that the padding absorbs the blow but still knocks your head back.

It’s like minor whip lash in a car accident but over and over and over.

MMA or BKFC is truly the sport of administering a concussion before someone else does

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explainlikeimfive-ModTeam t1_iuhn5s5 wrote

Reply to ELI5: Can temp agencies hook you up with a temporary job? by PlatonicRelationship

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Chuckleyan t1_iuhmml3 wrote

Reply to ELI5: Can temp agencies hook you up with a temporary job? by PlatonicRelationship

I got a job through an outfit called Manpower. They actually handled a pretty wide range of jobs - I was hired as a laboratory scientist for a one year contract. I went with the temp agency bevause I knew that I was going to go to grad school the next year. Basically, the company that I worked at payed them for my contract - and it seemed like a stiff premium at the time (like 50% of my salary).

Anyhow, it was a solid experience. They were begging me to stay on at the end of my contract but I was determined to go on with my education.

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bakerzdosen t1_iuhmh20 wrote

Reply to ELI5: How exactly do we get some much power from engine now, than we did 40, 50, 60 years ago? by Micromashington

Also keep in mind that internal combustion engines aren’t very efficient overall at converting the energy stored in the gasoline into kinetic energy. (aka a lot of the energy from gasoline is converted into heat instead.)

My favorite recent real-world example is that a current model Ford F150 Lightning with the largest-capacity battery is only capable of carrying the energy equivalent of 4 gallons of gasoline.

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explainlikeimfive-ModTeam t1_iuhmazz wrote

Reply to ELI5: Why do people get sun burnt/tan when sitting still, but don’t when they move? by Double-Emu7273

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explainlikeimfive-ModTeam t1_iuhm9bb wrote

Reply to ELI5 , What is the 'metaverse' , how does it work and why did it fail? by NorrlandErik

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Gnonthgol t1_iuhm3oe wrote

Reply to ELI5: Can temp agencies hook you up with a temporary job? by PlatonicRelationship

There are of course regional differences due to different laws and customs, even between different states within the US. But in general a temp agency gives the employees a long term job with them but then hire you out for short term jobs to other companies. This is how a temp agency can hook you up with a long term job. It is also quite common for companies to hire some of the temporary workers at the end of their contract. So it can be seen as a sort of a trial period where the company expect most not to be needed afterwards.

The list of jobs you provided is not the typical temp jobs. The demands for these jobs are pretty consistant so it makes a lot more sense to hire someone full time rather then the higher costs of temp workers. Where you do see a lot of temp workers are in phone sales, customer support, modeling business, conferance staff, etc. where the number of people needed can vary extremely based on various events. Where you do see temporary workers in other jobs it is often to replace a worker on temporary leave or in some cases to handle the increased demand around hollidays.

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