You Asked: Can we set up a solar panel in space and convert the waves to energy and send the energy to Earth? — Siddharth, Lucknow, India Marshall Answered: Yes, we could create and launch solar power satellites into earth orbit. Although the costs may be prohibitive for general use, this kind of technology might [...]

You Asked: How does a motorcycle’s transmission work? — Henry, Bangalore, India Marshall Answered: Almost all motorcycles use manual transmissions, with the clutch lever on the handlebars and the gear shift lever activated with a foot. The gear shift lever controls something called Sequential Gearbox. Inside the motorcycle’s transmission, there are the normal forks found [...]

You Asked: How do Bluetooth wireless earphones work? — Dinoy, Kerala, India Marshall Answered: Let’s start with a normal wired headset. It consists of a small speaker that fits in your ear, and a small microphone. The amplifiers for the speaker and mic are in the phone. And the battery power for the amps comes [...]

You Asked: Do teeth whiteners work? — Joseph, St. Louis, Mo. Marshall Answered: For many people, teeth whiteners definitely do work. As teeth age they become less white, and a tooth whitener can reverse the process. The reason why teeth get stained is because tooth enamel is slightly porous. It can absorb different chemicals that [...]

You Asked: How do window AC units work? — Vinai, Mumbai, India Marshall Answered: Think about a refrigerator. Inside the refrigerator are the cold coils to keep the food cool. Under the refrigerator is the compressor. On the back of the refrigerator are the hot coils to dissapate the heat produced by the compressor. In [...]