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Science & Mathematics

If 21,000 people split 5 billion dollars what would each receive?

Why does my car slow down without me changing the pressure of how much I press on the acceleration when it encounters a big puddle of water?
Best answer: There are many different ways to lose energy. Sliding friction is only one of those.
The majority of the power of the engine is used to push air out of the way.
The air was stationary so it had no energy.
When the car passes the air is given sideways and forwards velocity so it NOW has kinetic energy.
Therefore you know that this requires power from the engine. Even without knowing any of the mechanism of how it gets transferred.
The same is true of the puddle. It was stationary. Once the car passes the water is given speed in varying directions. So you KNOW that it has been given kinetic energy.
You are right that the water reduces the friction between the tyres and the road. If the road is just damp ( and no more ) the car actually needs less power to drive on the road.
Once the water depth increases, even to a depth of 1mm, then for the tyre to reach the road the water must be squeezed sideways and forwards. This tends to lift the car from the road a bit.
Which means that it is like making a continual hill just in front of the tyre.
Incidentally if you continue to accelerate then the water can ACTUALLY lift the car from the road ( called aquaplaning) and then you have zero control of the vehicle.
As a bike rider where the power comes from me I am acutely aware of how much power is needed in different conditions. 
Why must the absolute temperature (K) be used in all gas law equations?

Do frog legs taste like chickenORdoes chicken taste frog legs?

If you were on a planet near Alpha Centauri and looked toward our sun, what constellation would it be in?
Best answer: Alpha Centauri is at coordinates RA 14h 40m, Dec 60d 50', from our point of view. So looking from Alpha C, the coordinates of Earth are to opposite: 9h 20m, Dec +60d 50'. That's in the constellation Ursa Major (the Big Bear). 
6(2x+1)2(3x2)?

What is the acceleration of a race car that moves at constant velocity of 30m/s?

Algebra word problem?
Best answer: A short cut is the observation by don_sv_az that
48 minutes is the average time between 36 and 60 mins, so the cost is
the average amount (18.14 + 20.20)/2 = $19.22
The linear equation approach in pence.
2030 = 60m + b
1814 = 36m + b
m = 216/24 = 9
b = 2030 – 540
C = 9t + 1490
C(48) = 432 + 1490
The monthly cost for 48 min is $19.22 
Simplify the given expression. Write the answer with positive exponents only. Please Explain 2^2/(4a)^2?
Best answer: 2²/(4a)⁻²
negative exponent is the same as inverting
2²•(4a)²
square the numbers
4•16a²
64a² 
One line passes through the points (1,9) and (4,−9). Another line passes through points (6,5) and (8,−5).?
Are the lines parallel, perpendicular, or neither? 
Why was Earth extremely hot when it first formed?

If we live on the 3rd planet of the sun, how come we do NOT feel the earth moving at all ?

How do we know that dinosaurs weren't pink or orange, or whatever colour?

Should I Pursue Astronomy/Astrophysics?
I apologize in advance for this long post. Getting a PhD in astronomy is what I’ve wanted to do for years. I LOVE space. I have a passion for learning about the bodies of the universe and its chaotic, destructive nature. But then I spoke to the inhouse astronomer at my university that put me at a crossroads. I am currently a sophomore undergraduate majoring in physics. I told this professor what I planned on doing, namely astronomy graduate school in another state (as my school doesn’t offer it). He said, “May I talk you out of it?” He then went on to inform me at least twice of how dismal the job prospects are right now due to a glut of PhDs in the subject. He also said, “you do not want to be a perpetual postdoc.” He said to really think about what I want to do in graduate school. He always tells people to be absolutely sure. Don’t get me wrong, he’s a nice guy and I’m sure he was saying this for my own good. He asked me about my interests (regarding physics). I enjoy optics, I really like atoms and particles (quarks, gluons, etc.), and I may even have a burgeoning interest in astronautical engineering. He said that if I pursue one of these things instead, “you’ll be making twice my salary and you’ll be able to eat and have a roof over your head.” Should I even pursue an astronomy degree after graduate school? 
3X/5 – 2 = X + 1/3 Solve the equation above for x.?

Why is it that the planet mercury is photographed/illustrated in different colors in different photos?
Best answer: Some colors indicate temperature difference, or terrain heights, or composition of surface by elements. The colors are applied by computer graphics by the scientific investigators using numerical data from the instruments on spacecraft. 
Will science one day find a cure to aging/death?

Is the Universe hiding something from us?

Why wouldn't there be life after death?
Best answer: The Parable
In a mother’s womb were two babies. The first baby asked the other: “Do you believe in life after delivery?”
The second baby replied, “Why, of course. There has to be something after delivery. Maybe we are here to prepare ourselves for what we will be later.”
“Nonsense,” said the first. “There is no life after delivery. What would that life be?”
“I don’t know, but there will be more light than here. Maybe we will walk with our legs and eat from our mouths.”
The doubting baby laughed. “This is absurd! Walking is impossible. And eat with our mouths? Ridiculous. The umbilical cord supplies nutrition. Life after delivery is to be excluded. The umbilical cord is too short.”
The second baby held his ground. “I think there is something and maybe it’s different than it is here.”
The first baby replied, “No one has ever come back from there. Delivery is the end of life, and in the afterdelivery it is nothing but darkness and anxiety and it takes us nowhere.”
“Well, I don’t know,” said the twin, “but certainly we will see mother and she will take care of us.”
“Mother?” The first baby guffawed. “You believe in mother? Where is she now?”
The second baby calmly and patiently tried to explain. “She is all around us. It is in her that we live. Without her there would not be this world.”
“Ha. I don’t see her, so it’s only logical that she doesn’t exist.”
To which the other replied, “Sometimes when you’re in silence you can hear her, you can perceive her. I believe there is a reality after delivery and we are here to prepare ourselves for that reality when it comes….” 
What are double digit prime numbers, the sum of whose digits are also prime?