The ____ number system is used by most computers and programmable logic controllers.

a. binary
b. octal
c. decimal
d. hexadecimal

d. hexadecimal

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How much power in watts is consumed to move a 30-pound sack 100 feet in 2 seconds?

What will be an ideal response?

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A normally open (NO) switch is closed until activated.

Answer the following statement true (T) or false (F)

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The voltage v(t) across a device and the current i(t) through it are v(t) = 20sin(4t) volts and i(t) = 10(1+e^-2t)m-amps.

Calculate: (a) the total charge in the device at t = 1 s, assume q(0) = 0. (b) the power consumed by the device at t = 1 s.

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Before replacing parts such as bits, blades, or discs on any tool, you must _____

a. polish it with a fine steel wool b. recharge the tool?s battery c. disconnect the power source d. inspect them for cracks

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