Is it possible for the standard deviation of a list of numbers to equal 0? If so, give an example. If not, explain why not.
What will be an ideal response?
Yes. If all the numbers in the list are the same, the standard deviation will equal 0.
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The working load limit (WLL) of a rigging hook is accurate only when the load is suspended from the _____.
a. latch of the hook b. eye of the hook c. throat of the hook d. saddle of the hook
Si un trabajo requiere que se corten de rollos de 100 pies (30,48 m) trescientas piezas de lámina de revestimiento de 4 pies (1,21 m) de largo, ¿cuántos rollos de lámina de revestimiento se necesitarán?
a. 33 b. 10 c. 75 d. 12
For the motor in Problem 7.1 and for a fan-type load, calculate the following if the voltage is reduced by 20%:
a. Motor speed b. Starting torque c. Starting current d. Motor efficiency (ignore rotational and core losses)
When will the hull of a ship sink deeper in the water: when the ship is sailing in fresh water or in seawater? Why?
What will be an ideal response?