Lv 730,399 points

# Al P

Questions33
• ### A tripod lands on a plane?

A tripod lands on a plane a fixed number of times

such that the distance between vertices is always

s1=6m,s2=7m,s3=8m,s4=9m,s5=10m,s6=12m. What is

the maximum mass of water possible iff distinct

volumes are allowed? rho=1000 kg/m^3

Happy New Year Earth.

• ### REPOST: There are two isolated points?

There are two isolated points where

f(x,y)=5y^2 + 15x^2 - 60x^3y + 15xy - 30xy^3 - 30x^4 - 60x^2y^2 - 6y^4=k

where k=25/24 indeed. What are the coordinates of these two points.

Happy Halloween weekend.

• ### 24 hour clock problem?

A vehicle using a 24 clock will maximize distance after

occurrences of time, (h+m+s)s accumulate, and constant

speed then after is also given by (h+m+s) m/s.

At what time does the trip end and how far did it

travel? Time starts at 00:00:00.

• ### Super drat or just a matter of physics?

On a planet the size of earth a drat moves 100m

south, 100m east, 100m north, and ends up where he

(or she) started. Thinking out of the box, how did this in

fact happen, and what is the subtended angle

More details:

The drat is very confused. This keeps happening no matter

where he is on the planet. Spherical polar coordinate systems

do not exist relative to the drat.

The north pole does not exist.

The triangle like path is composed of

three arcs. There is no planetary dipole

magnetic field. This question is related

to a contact's now deleted question.

Actually, Anthony Hopkins had a similar problem;

he ended up where he started.

• ### How does your mind work?

After enough practice, many of us simply know answers to problems,

but do you have some idea about how your unique mind prepares to

analyze problems in math, physics, or anything for that matter.

In other words, how would you describe the preparatory inner workings of your mind?

For instance, do you use visual, audio, or some unique combination of things

There is no right or wrong answer so please feel free to

answer anyway you want. Thank you.

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• ### Simple EPR paradox #1?

Jack and Jill set up their particle polarization or spin detectors with symmetry in three

dimensional space. Midway between these locations particle pair production occurs.

These particles travel directly to said detectors. What is the probability that Jack will

correctly forecast Jill's result and vice versa according to expected experimental(s)?

Thank you.

• ### How long does Joe's trip last?

Joe the flying ant loves to run the rim of a hollow

cylinder at 12 m/s. After running from point (A), he decides

to fly at 3i m/s parallel to diametrically opposite point (B), but

he doesn't realize that his flight path (plane) is falling at rate

(g). So he ends up banging his head into the wall at point (B') directly

below (B). What is the maximum amount of time it takes Joe

to go from (A) to (B) if Joe, now dizzy, walks from B' to B at

2 m/s due to the lump on his head, and what unsimplified *physical *

equation represents his actual path? Thank you.

• ### How might Dr.Feynman intuitively explain time dilation?

How might the great Dr.Feynman explain proper time dilation of a

macroscopic object during a (real) round trip where it lands on

a hypothetical planet orbiting Proxima Centauri (4LY) and then returns

to earth in the most intuitive (simple) way? I'm asking on behalf of

a contact.

Respectfully, do not answer using arguments like

"space-time rotation matrices", "twin paradox", and

the like unless if is flat-out intuitive. I can envision

how he might do this. If said explanation exists, please

include it. As best I can tell, he always had a beautiful

simple way of explaining things like this.

• ### Puzzling violation of relativity?

Steve is upset because he has no

coffee with his breakfast so his

wife says: "Take off and buy some."

Off he goes lickity split in his space

plane at 0.99999c to a well known coffee

bean planet (4LY) orbiting proxima centauri

that sells coffee. Coffee beans are extinct

on earth due to GW. When he gets back he

makes some coffee and continues eating breakfast

with his family. He went into the past.

Was Einstein wrong?

• ### It is nice to go fishing again?

A shark in the ocean, initially hanging motionless on a spring scale

is suddenly whacked by a meteorite of equal mass. The resulting

motion of the shark is given by: f(t)=e^(-[π/200]t)sin( [(a+b]/a)/8] * t) = δ(t)

where a / b = (a+b) / a and (a,b) are segments of a straight line.

What is the mass of the meteorite?

Thank you.

• ### A ball floating in the ocean : reinstate?

A ball is floating in the ocean at latitudes south

of 60 degree south latitude. What is the density of the

ball? calculus or geometry derivation ok.

Thank you.

• ### What is the distance in meters?

Derive the distance between protons in a

hydrogen molecule (revist)?

Data:

k = 1 / 4πeo

m = 9.106E-31 kg

q = 1.602E-19 C

ħ

• ### Simple or hard thermodynamics?

What is the current effective BB thermal resistance of

air, and approximately how many d=100m ponderable

hydrophobic polystyrene balls (reflectivity=95%) do

I need to float on the ocean to lower the annual mean

surface temperature of earth by 1°C.

• ### A photon is sent directly from a hydrogen atom?

A photon is sent directly from a hydrogen atom on earth to a solid

sphere of uniform density at rest at the top of an inclined plane

plane. Consequently, the sphere rolls down the rigid incline without

loss. After collision, a single photon is emitted. Said photon

is absorbed by the same hydrogen atom on earth. How much time

has elapsed relative to an observer next to the atom?

Notes: my thought experiment: 1/1/2011

Assume equipotentials for atom, Sirius, and incline remain constant.

http://i985.photobucket.com/albums/ae336/sdopqwe82...

• ### A twenty four hour clock has metric?

A 24 hour clock has metric ds^2=r^2dΦ^2+dr^2 where r=4Φ and

marks time every half-hour What is the total distance traveled

during odd intervals?

• ### Easy fluid mechanics problem?

The planet mercury has been turned into mercury with the

uniform denstiy (p) of liquid mercury. An alien pentagonal

obelisk (density=p/3) containing a message for earth remains

at rest near mercury's center until equilibrium is reached at which

In order to reach Earth, the oblisk must reach escape velocity.

Does the obelisk reach Earth?

Data planet

No thermo.

elastic modulus = 3 * 10 ^ 9 N/m^2

p = 13570 kg/m^3

Data obelisk:

h1 = 10m (body)

h2 = 1m

edge=1 m

• ### Simple math question?

A regular 4-gon has a perimeter of 100 meters?

A similar "physical" 4-gon has a perimeter 97.0882063242942 m

The formula for the physical 4-gon is?

Each "conner" has a different radius of

curvature based on a mathematical constant.

ref:

• ### How high does the teeny tiny shell rocket fly?

A hemisphere shell with mass m and radius R rests on a horizontal table. At the top of the shell there is a hole. The shell is filled with a liquid with density=ρ up to height h<R, The air has density ρ_a=constant. How high (h) does the rocket fly?

Solve this problem using spherical coordinates and

the concept of hydrostatic flux density.

Bonus: What percentage of the water's energy

was imparted to the shell?

• ### A drat races a 3 sided coin rematch!?

A solid spherical drat of mass m radius r where g'=0.5g

races a solid "3 sided coin" of mass m radius r and of length

equal to 4r where g'=3g start rolling down the same incline at the

same time.

And the winner is?

• ### A strange grass satellite is orbiting Rigel?

A strange grass satellite orbiting Rigel at 7 AU

contains 1k diatomic molecules with energy

levels separated by 4m^-1. How many

are in the 3rd state.

Temperature Rigel = 11000K