5 points
5. Which of the following accurately describes a difference between an
audio CD and...
Physics, 18.12.2020 21:50 royaltyjl11
5 points
5. Which of the following accurately describes a difference between an
audio CD and a digital file?
A. Sounds can be stored on an audio CD but not in a digital file.
B. Unlike a digital file, an audio CD does not require a computer to record and play
back sound.
C. An audio CD stores sounds as grooves on the CD's surface, whereas a digital CD
stores sounds as computer code.
D. Unlike the information stored on an audio CD, the information stored in a digital file
can be converted into sound waves.
Answers: 1
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Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.
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