you'll know sound can pack a powerful punch. Sometimes, however, we want to enjoy music more quietly and intimately or in places where others don't want to hear what we're listening to. Trains and planes are noisy enough—just imagine the cacophony there would be if everyone sat with...
That's convection and conduction just about licked, but what about radiation? If you were to wrap aluminum foil round the outer cup, most of the infrared radiation the hot coffee gives off will be reflected back inside it, so that should solve that problem too. Apply all three of those ...
How would you distinguish between the following pairs by use of infrared Spectroscopy only? Tell what absorption would be present or absent in each case. *A.) 2-pentanone and 2-pentanol *B.) Acetoph Can you please explain about IR spectro...
long-term dimming that is also difficult to explain. What they found tells us something about the sudden dips in the star’s light, too: Their results show that a large, solid object like the hypothesized structure would not cause starlight to dim in the precise way the...
What non simple ratios do you see in DrGregs diagram? In one frame the ratio is 0.25 which is harder to work with than mine which is 0.5. Not a big difference but I want to keep things simple as possible! It doesn't show enough particles to tell. Sure it does, the rati...
reach us today are the ones that have been travelling to us at lightspeed since then. As the light from astronomical objects suffers fromredshiftdue to the expansion of the universe, and this shift becomes more pronounced with distance from the observer, this light displays in the infrared ...
In iris recognition, infrared helps to show up the unique features of darkly colored eyes that do not stand out clearly in ordinary light. These two digital photographs are then analyzed by a computer that removes unnecessary details (such as eyelashes) and identifies around 240 unique features ...
What's different about a cellphone is that it can send and receive calls without wire connections of any kind. How does it do this? By using electromagnetic radio waves to send and receive the sounds that would normally travel down wires. Whether you're sitting at home, walking down the ...
Memory foam is better because it's "viscoelastic," they tell you. It "was developed by NASA." But what exactly do they mean? Are these things helpful—or just a marketing con? Let's dig a bit deeper and find out.Photo: Blastoff: Are you sitting comfortably? Then we'll begin. The...
you'd use things likeGPS satellite navigation,lidar,sonar,radar, and infrared detectors,accelerometers—and any number of other sensors to build up a very different kind of picture of where the car is, how it's proceeding in relation to the road and other cars, and what you need to do ...