Explain how oysters are artificially “farmed” from the ocean
What will be an ideal response?
The oysters grow on bamboo rods that are hung by wires and attached to barrels. When harvested, the oyster meat
is sold to stores and the shells are used as poultry grit and for lime.
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The level of voltage at which the relay coil is energized to move the contacts from their normal, unoperated position to their operated position is called ____.
a. inrush current b. sealed current c. pickup voltage d. drop-out voltage
The tightness of a two-way solenoid valve depends to a degree on pressure acting downward on the ____.
a. sealing disc b. spring c. retainer d. stem
A solid-state phase monitoring relay provides protection in the event of a(n) ____.
a. power failure b. power brownout c. abrupt startup d. voltage unbalance
Building a shape with the use of many thin layers falls within the category of ____. ?
A. ?rapid prototyping B. ?computer-aided flow analysis C. ?computer-aided design D. ?computer-aided engineering