What is the minimum width of support straps used to hang flexible ducts?
a. 1/4 inch
b. 1 inch
c. 1-1/2 inches
d. 2 inches
c
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Suppose that the laptop is placed in an insulating briefcase with a fully charged battery, but it does not go into “sleep” mode, and the battery discharges as if the laptop were in use. If no heat leaves the briefcase, the heat capacity of the briefcase itself is negligible, and the laptop has a mass of 2.3 kg and an average specific heat of 0.8 kJ? kg?1? °C?1, estimate the temperature of the laptop after the battery has fully discharged.
The battery in a laptop computer supplies 11.1 V and has a capacity of 56 W? h. In ordinary use, it is discharged after 4 hours. What is the average current drawn by the laptop, and what is the average rate of heat dissipation from it? You may assume that the temperature of the computer remains constant.
The NEC requires that the ____ conductor have an outer finish that is either continuous white or gray for alternating-current circuits.
a. ungrounded b. charged c. grounded d. uncharged
Often, the best thing to do with a heavily infested plant is to ____, though this might be difficult for an
emotionally attached client.
a. treat it with insecticidal soap c. quarantine it b. discard it d. treat it with pesticides
____ occur when a beam rests on top of a column or another beam or when a beam must be attached to the flange of a column.
A. Framed connections B. Longitudinal connections C. Seated connections D. Partial connections