Which of the following substrates is safe for hermit crabs?
a. smooth gravel
b. ground nutshell
c. sand treated with water-soluble dye
d. cedar shavings soaked in tap water
A
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The immatures of insects that undergo complete or complex metamorphosis are called ____________________
Fill in the blank(s) with correct word
How are water pumps in hydronic heating systems checked?
A) By measuring the pump motor RPM using a digital tachometer B) By measuring the water flow in the system C) By measuring the impeller RPM using a stroboscope D) by measuring the temperature of the pump motor
What is the power at f1 and f2 in a resonant circuit that delivers 750 W?
A) 750 W at both frequencies B) 375 W at both frequencies C) 375 W at f1 and 750 W at f2 D) 17 W at both frequencies
Bus contention arises when more than one register output is "enabled" at the same time on a single data bus line. This condition will cause:
A) uncertain logic levels and possible damage to the input data lines of the registers contending for the bus. B) uncertain logic levels and possible damage to the bus line. C) uncertain logic levels and possible damage to the register output buffers.