Explain the diff erence between a digital signal and an analog signal.

What will be an ideal response?


A digital signal is a series of pulses that represent the ones and zeroes in our message, and an analog signal is a smooth, continuous wave (remember the garden hose analogy). Computers use digital signals; analog signals are transmitted on copper wire pairs. Digital signals have a number of advantages over analog, including less power required, less prone to interference, and easier error correction.

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The schematic wiring diagram uses photos to represent electrical components in the system.

Answer the following statement true (T) or false (F)

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Hydronic heating systems are systems in which water or ____________________ carries the heat through pipes to the areas to be heated.

Fill in the blank(s) with the appropriate word(s).

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Describe the two reasons stems are important to plants

What will be an ideal response?

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Engineers often use computers to model and analyze problems.

a. True b. False

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