Plug-and-play external USB capture cards (often referred to as âUSB video grabbersâ) are quietly revolutionizing the way that businesses and universities record and live stream video. Magewellâs XI100D HDMI to USB3 video capture dongle. External USB capture cards perform a task traditionally assigned to internal PCI capture cards or dedicated video capture appliances. They enable video to be captured from a wide range of sources, including those that output to VGA, DVI, HDMI, and HD-SDI.
Answer 4: Beach sand has different colors because there are many different minerals that make up sand. In California, our sand usually looks white because it has minerals like quartz and pieces of shells that are made of calcium carbonate.
The sand on each beach is like a fingerprint â it's unique to the particular beach where you find it, said Williams. The sand's unique composition, color and grain size are a result of the source rocks it came from, but also a result of coastal processes that modify the sand over long periods of time..s a final sandy thought, consider the fact that the sand on most of our beaches, especially on the East and Gulf Coasts, is rather old: some 5,000 years or so, Williams said.