Tag: science & technology

A car is retarding. So it must be

We have two lamps: one is broken (A), the other is glowing (B). Which of these lamps is emitting electromagnetic radiation?

Everybody knows that 'water seeks its own level' but very few people know why water seeks its own level. The reason has most to do with

A birthday candle burns in a deep drinking glass. When the glass is whirled around in a circular path, which way does the candle flame point?

If you release a ball inside a freely-falling elevator it stays in front of you instead of "falling to the floor" because you, the ball, and the elevator are all accelerating downward at the same acceleration, g. If you similarly release a helium-filled balloon, the balloon will--

Consider a boat loaded with scrap iron in a swimming pool. If the iron is thrown overboard into the pool, will the water level at the edge of the pool rise, fall, or remain unchanged?

An astronaut on earth notes that in her soft drink an ice cube floats with 9/10 its volume submerged. If she were instead in a lunar module parked on the moon, the ice in the same soft drink would float with

The occupants of an airplane flying in the midst of a thunderstorm in danger of being struck by lightning.

A thin stream of water bends toward a negatively charged rod. When a positively charged rod is placed near the stream, it will bend in the

A 40 watt bulb and a 100 watt bulb are connected in series to the battery. Which bulb will glow brighter?