Let X, Y, and Zbe jointly distributed random variables. Prove that Cov(X+Y, Z)=Cov(X, Z)+Cov(Y, Z).
What will be an ideal response?
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Find the resultant of the two concurrent forces F, which makes an angle ???? with respect to the positive x-axis, and G, which makes an angle ???? with respect to the positive x-axis. Show a sketch of F and G and the resultant.
F = 3.2(10)¹ kN ???? = ?120° G = 7.2(10)¹ kN ???? = 45°
One of the strongest joints is the
a. dovetail c. rabbet b. dado d. lap
Which of these statements about driving in areas with strong winds is true?
a. You should drive alongside other vehicles to help break up the wind. b. The lighter your vehicle, the less trouble you will have with the wind. c. Winds are especially a problem when coming out of tunnels. d. You can lessen the effect of the wind by letting some air out of your tires.
In the accompanying diagram, when the notch is between the sensor and the magnet, a(n) ____________________ is produced by the Hall generator.
Fill in the blank(s) with the appropriate word(s).