What are five structures for propagating and growing nursery plants?
What will be an ideal response?
• Greenhouses
• Coldframes
• Hotbeds
• Shadehouses
• Overwintering houses
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The pH of water should be near ____ neutral
A) 3.5 B) 7.0 C) 2.3 D) 9.4
When large DC motors require controlled steps of acceleration, a series of resistors connected to lockout relays provide the means for ____ motor acceleration.
a. smooth and uniform b. quick c. slow d. only slight
Which of the following statements is accurate?
An ammonia synthesis process works as follows: Fresh feed air and hydrogen are combined with a recycle stream and the combined stream is compressed to 10 MPa. The compressed stream enters a reactor, and a fraction of the entering nitrogen and hydrogen are converted into ammonia. The reactor effluent, still at 10 MPa, enters a condenser. The liquid and vapor streams leaving the condenser are in VLE. The liquid stream, which is almost pure ammonia, is the product. A fraction of the vapor stream leaving the condenser is purged, while the rest is recycled.
The basic light-emitting diode is formed by joining gallium arsenide (GaAs) or ____ with some other material.
a. gallium arsenide phosphide (GaAsP) b. zinc selenide (ZnSe) c. silicon carbide (SiC) d. gallium phosphide (GaP)