by Edward Dowden (1843-1913)
P.S. There are strict observational limits on the rotation of the Universe; see, e.g., here.
Follow @telescoper
by Edward Dowden (1843-1913)
P.S. There are strict observational limits on the rotation of the Universe; see, e.g., here.
Follow @telescoperIt’s been a while since I posted a problem in the folder for cute physics problems so here’s a nice little one for you to have a go at:
A vertical cylindrical tube of height 12cm and radius 6cm, sealed at the bottom and open at the top, is two-thirds filled with a liquid and set rotating with a constant angular velocity ω about a vertical axis. Neglecting the surface tension of the liquid, estimate the greatest angular velocity for which the liquid does not spill over the edge of the tube.
Answers through the comments box please!
Follow @telescoper
Too busy today (again) for anything else so I’m going to resort (again) to the Cavendish Problems in Classical Physics. I think I’ll eschew the multiple-choice format for this one, but will say that there is a small hint in the fact that the question is split into two parts:
The Eiffel Tower is 300m high and is situated at a latitude 49° N. What are the magnitude and direction of the deflection caused by the Earth’s rotation to:
Please give your answers, with reasons, through the comments box below. For legal reasons I should make it clear that you are not expected to perform either experiment.
Follow @telescoper