Pure maths, physics, logic (braingames.ru): non-trade-related brain games - page 13
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Purely physical (only 3 points):
There are two identical iron balls. One is suspended on a perfectly heat-tight string and the other is lying on a perfectly heat-tight table. Both balls are heated by 1°. Which ball would require more energy to heat which one? The balls are not giving off heat anywhere.
The condition is exactly that. We can assume that the filament and the table are completely non-thermal conducting objects (say cotton) and the radiation from the balls is negligible. Remember physics, comrades.
Purely physical (only 3 points):
There are two identical iron balls. One of them is suspended on a perfectly heat-tight string and the other is lying on a perfectly heat-tight table. Both balls are heated by 1°. Which ball would require more energy to heat which one? The balls are not giving off heat anywhere.
The condition is exactly that. We can assume that the filament and the table are absolutely non-conducting objects and the radiation from the balls is negligible.
The table will act as a reflector and the lying ball will heat up faster.
The logic here is that since the table does not conduct heat, it reflects it (otherwise we would have to disprove the law of conservation of energy).
The table will act as a reflector and the lying ball will heat up faster.
No, the heat isn't going anywhere. No reflectors: "the radiation from the balls is negligible".
The balls do not heat up to 500 degrees, they only heat up to 1 degree.
No, the heat isn't going anywhere. No reflectors: "the radiation from the balls is negligible".
The balls don't heat by 500 degrees, they only heat by 1.
What a spherical horse in a vacuum you are :)
Clarify the conditions.
There are two identical iron balls.
It's a dead end. Everything is the same. Both are conventionally insulated. Height is the same.
There is a fixing method. On the table, the ball is compressed, and on the string, it stretches. So?
Nothing. The volume and therefore the average density will remain the same (
Dead end
// It has nothing to do with the magnetic field and nothing to do with the rotation of the earth.
What's four points for? It's a freebie... :)
Let's play a better game, like on a shortened 11x1 board (doesn't change the point).
Dibs on the second one. ;)
Purely physical (only 3 points):
There are two identical iron balls. One is suspended on a perfectly heat-tight string and the other is lying on a perfectly heat-tight table. Both balls are heated by 1°. Which ball would require more energy to heat which one? The balls don't give off heat anywhere.
It's a dead end. Everything is the same. Both are conventionally insulated. Height is the same.
There is a fixing method. On the table, the ball is compressed, and on the string, it's stretched. So?
Nothing. The volume and therefore the average density will remain the same (
Dead end
// The magnetic field has nothing to do with the Earth's rotation.
the heat capacity is the same, even if we flatten it.
we have to look for something different and there is no difference ((
Tch, on the table of course :)
And why?