WattFlyer RC Electric Flight Forums - Discuss radio control eflight

WattFlyer RC Electric Flight Forums - Discuss radio control eflight (https://www.wattflyer.com/forums/index.php)
-   Humor (https://www.wattflyer.com/forums/forumdisplay.php?f=47)
-   -   Science question (https://www.wattflyer.com/forums/showthread.php?t=81413)

Don Sims 03-22-2021 01:38 AM

Science question
 

The 6th grade science teacher, Mrs. Parks, asked her class, "Which human body part increases to 10 times its size when stimulated?" No one answered until little Mary stood up, angry, and said, "You should not be asking 6th graders a question like that! I'm going to tell my parents, and they will go and tell the principal, who will then fire you!"
With a sneer on her face, she then sat back down. Mrs. Parks ignored her and asked the question again, "Which body part increases to 10 times its size when stimulated?"
Little Mary's mouth fell open; then she said to those around her, "Boy, is she gonna get in big trouble!"
The teacher continued to ignore her and said to the class, "Anybody?" Finally, Billy stood up, looked around nervously and said, "The body part that increases 10 times its size when stimulated is the pupil of the eye."
Mrs. Parks said, "Very good, Billy," then turned to Mary and continued. "As for you, young lady, I have three things to say: Number 1: You have a dirty mind; Number 2: You didn't read your homework; and Number 3: One day you are going to be very, very disappointed.

Don Sims 03-23-2021 11:18 AM

A museum visitor was admiring a Tyrannosaurus fossil, and asked a nearby museum employee how old it was.

"That skeleton's sixty-five million and three years, two months and eighteen days old," the employee replied.

"How can you know it that well?" she asked.

"Well, when I started working here, I asked a scientist the exact same question, and he said it was sixty-five million years old—and that was three years, two months and eighteen days ago."

Don Sims 03-23-2021 11:18 AM

Isaac Newton, Albert Einstein and Blaise Pascal were playing hide and seek. Albert was seeking, Newton and Pascal were hiding.

When Albert goes out to seek, he finds Isaac outside where he has drawn a meter square around himself.

Albert asks Newton "What kind of hiding place is that Newton?"

Newton replies "I am not Newton I am a Pascal."

Don Sims 03-26-2021 10:28 AM

We’re studying ‘light’ in science class and the teacher asks if she’s clear.

“No ma’am, you’re opaque.”

Don Sims 03-26-2021 10:29 AM

A guy goes to his doctor who runs some tests and comes back: "I'm afraid you have cancer and you only have 6 months to live"

The guy asks, "Are you sure? Is there anything I can do?"

The doctor says, "We've run all the tests twice and we're quite certain. However, you might want to go over to UC Berkeley and enroll in Professor Hoffman's CS357 computer science class."

The guy is puzzled; "Will that help me live longer?"

The doctor shakes his head. "No, but it will be the longest 6 months in your life."

Don Sims 03-27-2021 12:26 PM

Students, for your science exam you will be required to create a vacuum.

No pressure.

Don Sims 03-27-2021 12:27 PM

A group of dogs is called a pack. But what is a group of science dogs called?

A hypawthesis.

Don Sims 03-30-2021 12:39 PM

A professor is teaching computer science 101...

He gets to the topic of recursion, but after reading his prepared notes, one of his students seems particularly perplexed and questions the teacher.

"I don't understand, you said a recursive algorithm one that calls itself?" The student asks.

"Yes," says the teacher.

"So it's like a phone? Wouldn't it get a busy signal trying to call itself?"

"No, not like a phone, it's more like-" The teacher starts to explain, but is cut off by the student.

"Is it like a role call? Like when you call your own name?"

"No," the teacher continues "It's not-"

But the student immediately interrupts.

"Like calling a bet? You bet on yourself?"

"No!" The teacher finally blurts. "Look, I can see you're confused. Why don't I tell you a joke my professor taught me..."

He clears his throat and begins.

"A professor is teaching Computer Science 101..."

Don Sims 04-01-2021 10:48 AM

Computer Science Professor: Where's your homework?

Me: I'm so sorry, my dog ate my homework.

Computer Science Professor: Your dog ate your coding assignment?

**Awkward silence**

Me: It took him a couple bytes...

Don Sims 04-02-2021 11:47 PM

After hours of research i still cant make puns about trees.

You'd think everything I've Redwood help.

Don Sims 04-02-2021 11:48 PM

I am in the process of writing a big research paper on hurricanes.

The first draft really blew me away.

Don Sims 04-04-2021 11:23 AM

I’ve been doing some research into my family tree, and it turns out my Great Grandfather was a terrible dictator.

Apparently none of his secretaries understood a word he said.

Don Sims 04-04-2021 11:24 AM

A guy was claiming that onions are the only food that can make you cry.
So I threw a coconut at his face.

Don Sims 04-06-2021 11:21 AM

What do you call a highly cited epidemiology researcher with a social media presence?

An influenzer.

Don Sims 04-06-2021 11:22 AM

An ethnomedicine researcher is visiting a tribe deep in the Amazon and they present to him the leaves of a short native palm tree. They tell him that these leaves can be brewed into a tea that is a powerful laxative.

He says, "well, in extreme cases, do you ever have to resort to giving an enema?"

His guide responds, "Oh no no, with fronds like these, who needs enemas?!"

Don Sims 04-07-2021 01:49 AM

What do you call someone too stupid to justify the air he breathes?
An OxyMoron

Don Sims 04-07-2021 10:57 AM

Researchers for the Australian Roads Department found over 200 dead crows on the Great Northern Highway recently, and there was concern that they may have died from Avian Flu.

A Bird Pathologist examined the remains of all the crows, and, to everyone's relief, confirmed the problem was definitely NOT Avian Flu.

The cause of death appeared to be from vehicular impacts.

However, during the detailed analysis it was noted that varying colors of paints appeared on the bird's beaks and claws.

By analyzing these paint residues it was determined that 98% of the crows had been killed by impact with trucks, while only 2% were killed by an impact with a car.

They hired an Ornithological Behaviorist to determine if there was a cause for the disproportionate percentages of truck kills versus car kills.

The Ornithological Behaviorist very quickly concluded the cause:

When crows eat road kill, they always have a look-out crow in a nearby tree to warn of impending danger.

They discovered that while all the lookout crows could shout "Cah", not a single one could shout "Truck" ...

Don Sims 04-09-2021 11:54 AM

A proctologist gets sick of his medical career and decides it's time for a change. He does a bit of research and settles on trying his hand at being a mechanic. He attends mechanic school diligently and pays attention in the hopes of being the best mechanic in town.

After taking his final exam, he notices a mistake with the grade on the test and asks the teacher.

"Sir, you have me 150% out of a possible 100% on the practical exam. This must be a mistake!"

The teacher replies, "It's no mistake. 50% of the grade is for perfect disassembly of the engine. 50% is for perfect reassembly of the engine. I gave you another 50% on top because you did it all through the exhaust pipe!"

Don Sims 04-11-2021 12:49 PM

In the early 1970s, researchers discovered that a certain enzyme in a specific breed of seagull chicks granted dolphins that ate them a dramatically increased lifespan…

Hoping that this could be made viable for humans, they started extensive testing.

Unfortunately, the breed of gulls wasn't native to the area around their laboratory.

They sent a research assistant up the coast to gather additional specimens.

On his way back with a truckload of the tiny birds, he accidentally struck a cougar in the road.

Unfortunately for him, it was (at the time) the state animal and harming one was a felony.

The poor guy was charged with transporting young gulls across a state lion for immortal porpoises.

Don Sims 04-11-2021 12:50 PM

Researchers have recently started using lawyers instead of rats in their lab experiments.

You don’t get so attached to them, and there are some things a rat just won’t do.

Don Sims 04-11-2021 12:55 PM

I pulled up to the drive-thru of a fast-food restaurant and ordered coffee.

I asked the clerk to put some ice cubes into the cup so that I could drink the cool coffee quickly.

At the window, there was a delay.

Finally, a teen-aged girl came to the window looking frustrated.

"I'm having a problem," she announced. "The ice keeps melting."

Don Sims 04-15-2021 11:20 AM

Albert Einstein, Isaac Newton, Werner Heisenberg, Georg Ohm, Galileo Galilei, Max Planck, and Louis de Broglie were carpooling to work when they got pulled over for speeding.

However, when the police officer tried to ask them how fast they were going, he couldn't get a straight answer, and the group was so rowdy that they had to be brought in for questioning.

So all 7 of them are taken to the police station, and individually questioned. First, they were asked simply "Do you know how fast you were going?"

Heisenberg, the driver, said "It was definitely somewhere between 0 and 180 miles per hour. I can tell you exactly where we were though."

Newton says "We were going 92 miles per hour when we were pulled over - and here's the differential equation that proves it."

Einstein says "I'm relatively sure we were stationary - the earth beneath us was moving at 92 miles per hour."

Galileo says "We were going 67,000 miles per hour around the sun."

Broglie says "Um... Uh. Wavelength?"

Planck says "I believe we were moving at around ten duodecillion quanta per hour, give or take."

And finally Ohm, no matter how many times he was asked, screamed "I won't go! I won't! You'll never take me alive!"

Don Sims 04-20-2021 11:23 AM

A guy asks his friend, "Have you ever used a telescope?"

"No, is it fun ?", answers the latter.

"Yeah you should look into it."

Don Sims 04-25-2021 12:28 PM

So you've all heard about the neutron that walks into a bar, but what about...

A neutrino walks into a Mexican Restaurant. He orders a taco with extra chili sauce.

The bartender comes up to his table with a taco and a gigantic bottle of super-hot chili sauce. He opens the taco, starts pouring sauce and asks: "So how much salsa do you want, amigo?"

The neutrino answers: "NO MASS! NO MASS!"

Abuelo 04-25-2021 01:43 PM


Originally Posted by Don Sims (Post 1029453)
So you've all heard about the neutron that walks into a bar, but what about...

A neutrino walks into a Mexican Restaurant. He orders a taco with extra chili sauce.

The bartender comes up to his table with a taco and a gigantic bottle of super-hot chili sauce. He opens the taco, starts pouring sauce and asks: "So how much salsa do you want, amigo?"

The neutrino answers: "NO MASS! NO MASS!"

For awhile I believed whatever the atoms were telling me, but I finally stopped. Seems they make up everything.

Don Sims 04-26-2021 11:12 AM

A geek dies and goes to heaven.

After spending a few days there, he realizes there are a lot of people he wants to talk to, and a lot of questions he wants to ask them. He walks up to an angel and asks, "So how come we don't have iPads up here? It would be really nice to have an iPad; that way I could jot down a note about something I want to ask someone, and when I meet them, I can look it up again."

The angel says, "Dear brother, in heaven we do not need iPads to remember things for us, for we have perfect memory."

The geek replies, "But I heard rumors that in hell they have iPads. Why would they have them down there if we don't up here?"

The angel says simply, "Here's a telescope. See for yourself."

So the geek looks through the telescope. "Huh," he exclaims. "It looks like they're all looking for chargers!"

solentlife 04-26-2021 12:53 PM


Originally Posted by Don Sims (Post 1029466)
A geek dies and goes to heaven.

After spending a few days there, he realizes there are a lot of people he wants to talk to, and a lot of questions he wants to ask them. He walks up to an angel and asks, "So how come we don't have iPads up here? It would be really nice to have an iPad; that way I could jot down a note about something I want to ask someone, and when I meet them, I can look it up again."

The angel says, "Dear brother, in heaven we do not need iPads to remember things for us, for we have perfect memory."

The geek replies, "But I heard rumors that in hell they have iPads. Why would they have them down there if we don't up here?"

The angel says simply, "Here's a telescope. See for yourself."

So the geek looks through the telescope. "Huh," he exclaims. "It looks like they're all looking for chargers!"

When travelling - remember those days we sat in airports ? Well anyway ... having spent many hours sat in airports around the world - you can guarantee to see a number of people wandering around with 'white iPhone / iPad' cable in hand looking for charging point ... fact !

Don Sims 04-27-2021 11:42 AM

A Native American Chief had three wives, all of whom were pregnant.

The first gave birth to a boy. The chief was so elated that he built her a teepee made of deer hide.

A few days later, the second gave birth also to a boy. The chief was very happy. He built her a teepee made of antelope hide.

The third wife gave birth a few days later, but the chief kept the details a secret. He built this one a two story teepee, made out of a hippopotamus hide. The chief then challenged the tribe to guess what had occurred.

Many tried, unsuccessfully. Finally, one young brave declared that the third wife had given birth to twin boys.

"Correct," said the chief. "How did you figure it out?"

The warrior answered, "It's elementary. The value of the squaw of the hippopotamus is equal to the sons of the squaws of the other two hides."

Don Sims 04-27-2021 11:43 AM

I lost my astronomy job at the observatory.

No matter how hard I tried I just couldn't stay focused.

Don Sims 05-09-2021 10:39 AM

Some first year university students come home from holiday for a surprise math test of 'What's 2 + 2?'

The engineer says, "Well it's 3.75, but given the situation we can round it to 5."

The mathematician goes and works for a while, then comes back saying, "I don't know what the answer is, but I know one exists."

The astrophysicist says, "Rounding to the nearest million, the answer would be 0."

The psychology student says, "Can we talk about why you are asking this question?"

The finance student subtly asks, "What do you want the answer to be?"

The sociology student wants to know the implications of this question.

The medical student, who is the last to answer, says, "Well that's easy, it's 4. I memorized it."

Don Sims 05-12-2021 10:48 AM

A guy on a speed date with a blond

Guy: Hello! I am John. Nice to meet you.

Girl: Nice to meet you too!! I am Jane. What do you do for a living, John?

Guy: I am an Astronomer.

Girl: OMG!! That's so cool. I am a Gemini..

Don Sims 05-15-2021 12:49 PM

A man dies and goes to Hell.

Satan greets him and says, "Welcome to hell, Dave. First, the wi-fi password is..."

Dave says, "Wait, you guys have wi-fi?"

Satan replies, "Of course we do."

"That's certainly not bad at all," says Dave.

Satan continues, "So, as I was saying, the wi-fi password is the number pi."

Don Sims 05-18-2021 11:49 AM

The density of Saturn is so low that the whole planet would float on the water in your bath.

However, you wouldn’t want to try this experiment at home as it would leave a massive ring around the tub.

Don Sims 05-18-2021 11:50 AM

An engineer and a mathematician are both interviewed for a job...

One of the interview questions is, "What is pi?"

The engineer answers, "About 3."

The mathematician is still answering to this day.

Panther 05-18-2021 08:37 PM

All great jokes Don. Thanks for sharing.

Don Sims 05-20-2021 04:00 AM

A school teacher was arrested today at John F. Kennedy International airport as he attempted to board a flight while in possession of a ruler, a protractor, a compass, an ancient wooden device called a "slide-rule" as well as a code device called an "abacus" that he claimed was a calculator.

At a morning press conference, the Attorney General said he believes the man is a member of the notorious Al-Gebra movement. He did not identify the man, who has been charged by the FBI with carrying weapons of maths instruction.

"Al-Gebra is a problem for us," the Attorney General said. "Al-Gebra has terrorized many young people for years. They derive solutions by means and extremes and sometimes go off on tangents in search of absolute values".

"They use secret code names like 'X' and 'Y' and refer to themselves as 'unknowns,' but we've determined that they belong to a common denominator of the axis of medieval with coordinates in every country."

As the Greek philosopher Isosceles used to say, "There are 3 sides to every triangle.'"

crxmanpat 05-20-2021 04:19 AM

True story. Back in High School we were studying the periodic table. When we were finally given the test, our Science Teacher included a question for bonus points. The question was:

"What compound is expressed as BaNa2?"

























The answer: Banana! :D

Panther 05-20-2021 07:00 AM

Yeah I guessed Banana before I saw the answer.
Man I hated Al-gebra , Geometry and Triganometry. Guess what I was hopeless at it but I am still here today. I survived without it. !!

ron_van_sommeren 05-20-2021 10:41 PM


Originally Posted by Panther (Post 1029845)
... Man I hated Al-gebra ...

Especially for you :D

The 'full' story.
Even a seemingly small change/error in setup can result in quite an unexpected increase.
Therefore always measure current and power in a new or changed setup.
Because current and power drawn are proportional to
  • pitch
  • #blades
  • voltage² :eek::eek: respectively voltage³ :eek::eek::eek:
  • kv³ :eek::eek::eek:
  • diameter⁴ :eek::eek::eek::eek:
So even a small change/error in setup can have huge effects.
Increase in current with one or two cells added, simple table - RCG

Expensive examples.
Going from 2s to 3s, a 50% increase, would (3/2)²=2.2 fold current, more than double, 120% extra.
A 25% increase in velocity konstant kv³ would (1.25)³=2 fold current, 100% extra.
A mere 10% increase in diameter would (11/10)⁴=1.1⁴=1.4 fold current, 40% extra.

Extreme examples.
Doubling voltage would 2²=4 fold current.
Doubling velocity konstant kv³ would 2³=8 fold current.
Doubling diameter would 2⁴=16 fold current.

Panther 05-21-2021 12:32 AM

Argh!!! No No No Ron...


All times are GMT +1. The time now is 04:05 PM.

Powered by: vBulletin
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.

Page generated in 0.08478 seconds with 7 queries