It is likely that you have walked around a cold house barefoot at some time or another in your life. If so, you will probably have noticed that under such conditions, carpeted floors feel warmer to walk on than tile.
It should be clear that this is the case even when there is absolutely no difference between the actual temperatures of the various stretches of flooring. So why do we perceive a difference?
Try sitting straight on a chair, with your back and lower legs vertical, and your thighs horizontal. You will discoed that if you neither move your feet nor bend your torso forward, it is impossible to stand up.
Feel free to try it. You will be unable to stand until you either move your feet back, or your chest forward.
Motion pictures are a wonderful entertainment, but we should never forget that they provide an imitation of reality, rather than a reliable model. There are many possible examples of this to choose from, but let us select one of the simpler ones.
It is comparatively common, in movies, to see some unfortunate character fall from a cliff or very high building. This fate is invariably accompanied by a long scream of terror, which gets steadily fainter as the doomed victim plummets away.
What is the error commonly encountered with this sound effect?
Best of luck to solve this one and as always, the answers are in the comments.
The first elevator machine is believed to have been the invention of Archimedes, in the third century BC. It took the form of a rudimentary cab supported by a hemp rope, and powered by the manual labour of humans or animals.
It wasn’t until 1852 that Elisha Otis devised his safety elevator, designed to lock in place by toothed guides at the side of the wall, if it started moving too quickly. He demonstrated the principle at Crystal Palace in 1853, on an open elevator platform above a stage, set between two toothed girders.
Most modern elevators are derived from his designs – but unlike his demonstration, they are enclosed within shafts. Though this is primarily for convenience, what benefit does a well-fitted shaft offer that a securely enclosed cab does not.
Hello dear readers, I have another puzzle for you for Solve it Sunday. If you like donkeys, if you like puzzles, if you like riddles, if you like using that thing sitting in your skull and are bored out of your mind, you should take a look!
Several statements are given below. You may assume – for the duration of this problem – that they are absolutely true in all particulars. From that assumption, you should be able to provide an answer to the question that follows.