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.
Black Sand Beaches. Black sand at Kalapana. This new black sand beach is forming after the old one was swept away by a lava flow in 1986. The sand on all black sand beaches on Hawaii is made out of tiny fragments of lava. In contrast to the green and white sand, most of the black sand is created almost instantaneously. When hot lava enters the water it cools down so suddenly that it solidifies, and shatters into large amounts of black sand.