@mark noble,

Again your lack of math skills seem to make this difficult to grasp, but it's fact. A still, 32 mile long lake like the dead sea is not flat, it rises like a dome matching the curvature of the earth. The earth is 24,901 miles in circumference, r=3959 so the 32 miles represents about 1/778 of the earth's circumference, or approximately 0.4626 degrees of arc, 2π/778 radians. Cos 0.5(0.4626)*r gives the radius of the point midway between the endpoints of the lake on a straight line (instead of on the curved surface). Compare this to the value of the earth radius itself and you can easily compute the height of the still water at the middle of the dead sea.

This is similar to what carpenters do to see if a board is flat... they look along the surface.

The outcome would be different times of landing, on the basis of air.

@Banana Breath,

Math has nothing to do with it.

The premise is founded on logic, not math.

@Banana Breath,

Heaps of pointless numbers again.

It's 120 miles.

Trust me.

@David Smith,

David Smith wrote:

"In religion you have certainty without proof.

In science you have proof without certainty."

Bullshit.

Its more like

"In religion you have

**conjecture** without proof. In science you have proof and certainty is irrelevant if experiment agrees with observations then it is acceptable."

@mark noble,

Newtons' Cradle.

10 steel balls (Settled) - You know the drill - Raise a ball, let go, force travels along medium (balls) and ball (at other end) reacts accordingly.

OK - From impact to discharge (ball A's impact - Ball B's (last ball) reaction) - What is the speed between the two events?

At what speed does the force from ball A reach ball b?

It's suprisingly quick, btw.

But takes forever too.

I cast my vote for validity's answer. I'll bet that for the real world, I can come up with objections ad nauseam. However, since this is a forum on mathematics, all of these are, strictly speaking, out of bounds.

Lots of imaginations and zero science.

To start, it is a big task to make i million balls all of them exactly the same. If solid, they will differ a little nit in shape, is filled with air or water, they will have a weak point in different locations.

Then, to drop them "at the same time" requires of such a precision method that will allow such event. So far, your idea is just that, infantile imaginations.

Why not starting with two balls dropped from the top of a building?

Later you add another ball, and so forth, until you and friends can't drop them "at the same time".

In order to idealize something big, start with something simple, so you will learn new methods to perform the desired experiment with tens of balls, hundreds of balls and so forth.

Two balls is a good beginning.

@cameronleon,

You are overlooking the point (Which is hypothetical).

We needn't birth and nurture people into a platonic-cave to understand its allergorical nature.

Point is (Physically) - No two things incur (precise) experiences.

No two atoms

No two humans

No two anythings...

Their functions may be 'seemingly' identical - Though they ain't.

@dadpad,

dadpad wrote:
G'day mark.

Quote:It is the real world answer I am interested in.

It seems to me you have placed many so conditions on your experiment that cannot be possibly be in a real world.

Either you want a theoretical answer or a real world answer.

Wind factors, air resistance, perfect spheres, arcs related to earth curvature and gravity all impact. All the above have been mentioned by other posters as real world factors.

I'm no scientist so i wont even attempt an answer.

Hell there is the small/tiny effects of the moon gravity for that matter on the balls. Due to the moon or the earth g field not being point sources.

You would get a very narrow bell curve for fall times in my opinion.