Author Question: What is one disadvantage of a retractable roof greenhouse? What will be an ideal ... (Read 39 times)

mynx

  • Hero Member
  • *****
  • Posts: 555
What is one disadvantage of a retractable roof greenhouse?
 
  What will be an ideal response?

Question 2

When is a staged controller more practical than thermostats?
 
  What will be an ideal response?



flannelavenger

  • Sr. Member
  • ****
  • Posts: 322
Answer to Question 1

A single covering is used on the greenhouse that looses more heat than
double roof coverings.

Answer to Question 2

1) When a signal from a single sensor such as temperature is used to
activate several stages of response, such as 2 stages of heating and 3 stages of
cooling. 2) When signals are received from more sensors than just a temperature
sensor.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Did you know?

People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

Did you know?

Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

For a complete list of videos, visit our video library