Answer:
An artificial Christmas tree is an artificial pine or fir tree manufactured for the specific purpose of use as a Christmas tree. The earliest artificial Christmas trees were wooden, tree-shaped pyramids or feather trees, both developed by Germans. Most modern trees are made of polyvinyl chloride (PVC) but many other types of trees have been and are available, including aluminum Christmas trees and fiber-optic illuminated Christmas trees.
Explanation:
Answer:
0.1 nm
Explanation
Potential deference of the electron is given as V =150 V
Mass of electron 
Let the velocity of electron = v
Charge on the electron 
plank's constant h =
According to energy conservation 

Now we know that De Broglie wavelength 
Answer:
Feedforward basically configured and used mainly to avoid errors in a control system entering or disrupting a control loop
Explanation:
Feedforward basically configured and used mainly to avoid errors in a control system entering or disrupting a control loop. Although Feedforward control seems to be a very attractive idea, it imposes a high responsibility on both the system developer and the operator to examine and consider mathematically the effect of disruptions on the process concerned.
example of feedforward is
Shower
which consist of following control points
Hear toilet flush (measurement)
Customize water to compensate
feedback refers to that point when water turns hot before the configuration changes
Answer:
hmm true
Explanation:
becuase i think alogorthm is wht u do regurkry if i helped mark me brailist
Question Continuation
True or False?
Answer:
False
Explanation:
Given
Columns: book_title and year_released
SQL statement: SELECT book_title, year_released FROM books GROUP BY year_released
Expected Result: To select the number of books released each year
Although the GROUP BY used in the SQL statement is meant to group rows with same values into summary rows but it's not user properly because the GROUP BY clause, as used here needs the COUNT aggregate functions to group the result-set by one or more columns.