When soil in a field is pasteurized by pulling a steam rake across the field, what mechanism is used to insure that the soil remains at the desired temperature for 30 minutes?
What will be an ideal response?
A sterilization cover is attached to the rake which drags behind it. The
length of the cover is designed to require 30 minutes to pass over a given point.
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Poor inner city children are exposed to lead toxicity primarily from ________
A) uptake from soils into food plants B) by atmospheric deposition on plant leaves C) eating soil and dust D) lead containing paint on toys
The oil drains back to the oil pan through ________
A) Drainback holes B) Drain pumps C) The pushrods D) The camshaft
Which computer function describes how the computer handles inputs?
A) Storage B) Process C) Output D) Input
Electrical contacts, electrodes, and similar industrial components are often made from _____
a. magnesium alloys b. precious metals c. nonferrous iron d. pure nickel