How does the master clock in the industrial building sense time?
What will be an ideal response?
This master clock senses time by receiving a radio signal from WWV, a radio station that broadcasts time pulses. WWV is operated by the National Bureau of Standards and is used as a time standard throughout the United States. A cesium beam atomic clock is used to produce the pulses that are transmitted. WWV can be received on frequencies of 18, 20, and 60 kHz, and on frequencies of 2.5, 5, 10, 15, 20, and 25 MHz. At the beginning of each minute, a 1000-Hz signal is transmitted, except at the beginning of each hour when a 1500-Hz signal is transmitted. The clock in this installation contains a radio receiver capable of receiving WWV pulses. The timing of the clock depends on the pulses received, and, in this way, the time clock is continually updated each minute.
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What will be an ideal response?
Which of the following are indoor environmental quality factors which could increase occupant productivity? Select all that apply
A) Designer masking odorant. B) High-quality lighting. C) Daylight and views. D) Thermal comfort. E) All of the above.
El dispositivo más adecuado para transportar bobinas de cable muy grandes es:
a. un transportador de bobinas de cable. b. un carro estándar. c. un montacargas. d. una grúa
Torque is expressed in units of ________
A) Foot-pounds B) Foot-pounds per minute C) Pound-feet per second D) Pound-feet