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-- my humble apologies.
Placing things under running cold water works pretty well, a hot saucepan will be cool in just a few seconds.pgp_protector said:
That's a tough one. He is best known for relativity both special and general but he won the Nobel prize for explaining the photoelectric effect. I think you could have a contest on this one. I actually teach my students one Einstein equation used for predicting the vicosity of dilute suspensions of spheres which works fairly well for very dilute emulsions but I doubt many people would consider that his biggest contribution to science.
The pad would work if it was reaaaally cold, and only on the part that had something on it (otherwise it would be covered in frost). In theory, any refrigerating heat pump would do the trick. It'd just have to be an ultra-refined fridge, of sorts. Hmm...
Positing that the speed of light is constant, I would say, since all of relativity follows from that.
They've evolved to use the Moon as a kind of beacon. They fly towards it, but they can obviously never reach it. This means the individuals converge as they all fly towards the same location (namely, the place underneath the Moon). Or so the theory goes.
They're existential nihilists, and thus fling themselves into oncoming traffic.
)
With just a yardstick, I'd measure the pole's height directlyOkay, here's a simple one:
Let's say you're 6 feet tall and there's a pole in the yard of unknown height.
(We'll say 30', just for the sake of it; and yes, you're metric, but this is from the other side of the pond.
Anyway, you're 6 feet tall, and there's a pole in the yard of unknown height.
How can you measure the pole's height with just a yardstick?
. Put it next to the end of the pole, along its length. Then, putting my finger at the point where the yardstick runs out, I'd move the yardstick up until the other end is touching my finger.
The pole is in the ground and goes 30 feet into the air.With just a yardstick, I'd measure the pole's height directly
That's deceptively easy... did I misunderstand the question?
If I wanted to show off, I'd put one end of the pole at the top of my head, and rest the other end on the ground, so it made a diagonal. I'd them use the yardstick to measure the distance from my feet to where the pole touches the ground. If that distance is d, then the height h of the pole is given by h = √(36 + d[sup]2[/sup]).
EDIT: where d is in feet; the conversion ratio is 1 yard = 3 feet.
