A Monkey Climbing A Rope – What Happens?
Question: A monkey hangs on one end of a rope which passes over a pulley and is balanced by a weight on the other end; the weight is the same…
Why does the Earth rotates so slowly?
Question: The eight planets rotate on their own axes at different speeds. Generally, the greater the mass, the faster the speed. Jupiter, the largest planet, has also the fastest speed…
How are the traffic lights colours chosen?
Question: Why are the colours red, green and amber chosen for traffic lights? Answer: In the daylight, you can see the colour red more clearly than any other colour. It…
Why do metals feel colder than plastics in air-con?
Question: In an air-conditioned room, a metal box and a plastic box both have the same temperature. Yet, why does the metal box feel colder? Answer: The metal box feels…
What about the other side of the Moon?
Question: All the manned landings on the moon took place on the side of the moon facing the Earth. Why not on the other side?Answer: All the landings were on…
Cracking Glass with hot water?
Question: If you pour hot water into a glass (drinkware), what are the chances that the glass (drinkware) will crack? If so, what precautions can you take? Answer: Glass (drinkware)…