Concept explainers
On an audio compact disc (CD), digital bits of information are encoded sequentially along a spiral path. Each bit occupies about
where the 2 is for the 2 loudspeakers (the 2 stereo channels). Note that N0is less than the number N of bits actually read per second by a CD player. The excess number of bits (= N - No)is needed for encoding and error-correction. What percentage of the bits on a CD are dedicated to encoding and error- correction?
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Physics: Principles with Applications
- Picnickers see a lightning flash and hear the resulting thunder 5 seconds later. The storm is traveling at a rate of 21 km/hr.Use 344 m/s for the speed of sound.(a) Roughly how far away is the storm in miles?Don't use this number for parts (b) thru (e)(b) How far away is the storm (hint: use 344 m/s...)?(c) How fast is the storm in m/s?(d) How long do the picnickers have before the storm arrives (sec)?(e) How long do the picnickers have before the storm arrives (min)?arrow_forwardIn the past, ships often carried small cannons that were used when approaching shore in dense fog to estimate the distance to the hidden land. Explain how this might have been done.arrow_forwardTheee conductors aime cOmpying comments, I, - I2= 2A into the poge and T3-6A aut of PRents , poge magnitude ond dhieecton at the topee per conit length experienced by the wine în the as shoen in the tollwing gune . Find the the torce Pern middle (wine 2) 10 0m 10 cmarrow_forward
- For the circvit shawn t2 =0.89 mA 5.68 B,-27.0 Kん こ Re =10.1 K Vz =85.63 Determire the Potchal acvOSS the souce Cin VJ 工 R, Rearrow_forwardTrying to determine its depth, a rock climber drops a pebble into a chasm and hears the pebble strike the ground 3.46 s later.(a) If the speed of sound in air is 343 m/s at the rock climber's location, what is the depth of the chasm? ?m (b) What is the percentage of error that would result from assuming the speed of sound is infinite? ?%arrow_forward1. A 1.2 m rice reaper operates at an average speed of 4 km/h. The average width of cut is 20 cm less than the rated width. The average time for turning, adjusting, clearing of clogged cutting blades, transferring to other fields to be harvested, and other miscellaneous interruptions amounted to 15% of the theoretical operating time. Every two hours of operation, the fuel tank has to be refilled and refueling takes an average time of 10 minutes per hectare. Downtime, including changing of operators takes an average of 5 minutes per hectare. Determine: a. Theoretical Field Capacity b. Effective Field Capacity c. Field Efficiencyarrow_forward
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- During heavy exercise, human heart rates can reach 160 beats per minute. What is the time per beat in units of seconds? Number secarrow_forwardThe position of a particle depends on the time according to the equation S = ct˄2 - bt˄3 where S is in meters and t in seconds. What units must c and b have?arrow_forwardA mouse runs 4.5 m [E] then 6.0 m [N]. The displacement of the mouse is:arrow_forward
- Physics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningClassical Dynamics of Particles and SystemsPhysicsISBN:9780534408961Author:Stephen T. Thornton, Jerry B. MarionPublisher:Cengage Learning