List considerations when editing video files for the web.
What will be an ideal response?
You can manipulate certain aspects of video-frame size, frame rate, bit depth, compression scheme, and overall video quality-to optimize web videos. Although you might never edit video yourself, understanding these aspects can help you make informed choices about including video on your website. For web-based videos, consider the following:• Frame sizeis the number of pixels for the width and height of the video display.• Theframe rateis the number of times per second that the picture within the video changes. Web video frame rate ranges from 10 to 15 frames per second (fps). A higher frame rate means smoother playback.• As with audio, the greater the number of bits or bit depth, the bigger the file size. If you decrease a video segment from 16-bit to 8-bit, the file size will decrease significantly, as will the quality. Experiment with different settings to find a balance that produces quality videos optimized for playback on various computers, download speeds, and devices.• You can adjust the general quality level of your video by changing the compression. Similar to editing photographic images, video compression is lossy or lossless. A lossy compression reduces the file size of your video by removing data, but the quality of the video may decrease noticeably. A video with compression between low and medium typically is suitable quality for the web.
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a) electric fields due to current carrying wires b) magnetic forces between two current carrying wires c) magnetic fields due to current carrying wires d) magnetic forces acting on charged particles e) magnetic fields due to permanent magnets
The Miller-Urey experiment relied on special conditions found only on Earth
Indicate whether the statement is true or false
What is the usual symbol used to represent an amount of charge?
a. C b. q c. e d. none of the above
An unfueled 1000-kg experimental rocket sled on level frictionless rails is loaded with 50 kg of propellant. It exhausts the propellant in a 20 s "burn.". If the rocket, initially at rest, moves at 160 m/s after the burn, what impulse is experienced by the rocket sled?
a. 1.1 × 10^5 kg•m/s c. 1.5 × 10^5 kg•m/s b. 1.6 × 10^5 kg•m/s d. 1.9 × 10^5 kg•m/s