How a scanning electron microscope (SEM) works A scanning electron microscope scans a beam of electrons over a specimen to produce a magnified image of an object. That's completely different from a TEM, where the beam of electrons goes right through the specimen. Electrons are fired into the...
What is a fault block mountain and how is it formed? Why do climates near the coasts tend to be more moderate than in the middle of the continent? What is the difference between converging and diverging waves? What happens to a converging wave after it has converge...
Explain how to determine nodes and antinodes. Nodes and Antinodes: In a wave pattern, there are some points that seem to be stationary. These points, typically delineated as points of no displacement, are cited as nodes. There are different poin...
A summary of how clocks workIn summary, then, the key parts of a pendulum clock are:A dial and hands that indicate the time. A weight that stores (potential) energy and releases it to the clock mechanism as it falls, very gradually, over the course of a day (or several days, if ...
Gagliano believes that plants are able to use_(they) leaves to detect sound waves,_ 8make tiny vibrations(振动)as they're produced. This could explain why so many people believe that singing or playing music to their plants_ 9(help)them grow. So,does this mean we should start treating ...
To them, CDs are probably still relatively new technology and, depending on how serious they are about music, they may have quite a lot of recordings in older forms, such as long-playing (LP) records. The machines that play records, record players (also known as turntables and, ...
For the first half, we get silence because the two waves cancel out. For the second half, we get a noise that's twice as loud because the two waves reinforce one another. And that's how noise cancelling works! With real noise reduction, it's never possible to exactly cancel the two ...