Describe how digital signals are transmitted over a telephone line or TV cable.
What will be an ideal response?
To transmit a digital signal over a telephone line or TV cable, which are analog media and were not designed to carry a purely digital signal, a device known as a modem (MOdulator/DEModulator) is used. A modem takes the distinct pulses of electricity that make up digital signals from a computer and encodes them onto a continuous analog signal for transmission. The process of encoding the digital signals (bits) onto an analog wave is called modulation. The modem at the other end of the connection then reverses the process by receiving an analog signal, demodulating it, which means extracting the bits from it, to convert them back into a digital signal.
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Nancy applied 48-52-45 units of fertilizer per acre to 220 acres in pasture. She used 46-0-0 urea at $499 per ton, 18-46-0 DAP at $704 per ton, and 0-0-60 muriate of potash at $567 per ton. What was the cost of the fertilizer?
What will be an ideal response?
When climatic conditions are unsatisfactory leaves become:
A) shredded B) yellow C) ?overly wide D) dark green
What is regenerative braking?
What will be an ideal response?
The speed of air is measured in:
A) Force per minute - FPM. B) Feet per minute - FPM. C) Cubic feet per minute - CFM. D) Capacity per minute - CFM.