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How was the mount MacDonald tunnel built?
The tunnel was built under two contracts. One contractor used conventional drill and blast to excavate the entire 40 ft. high by 20 ft. wide tunnel profile, working from the west portal. The east portal contractor excavated a +or- 20 ft. diameter top heading with a tunnel boring machine and then used drill and blast to remove the remaining "bench". The tunnel was lined with concrete after excavation was complete. A third contractor built the ventilation shaft. The tunnel uses a unique ventilation system that consists of the shaft, a tail tunnel connecting the shaft to the main tunnel and doors at either end of the tunnel and near the vent shaft tail tunnel. The doors open and close so as to push exhaust out the vent shaft or pull fresh air from the vent shaft into the tunnel, depending on the position of the train in the tunnel. The tunnel was built to reduce the grade for westbound coal trains. This reduced the need for up to nine additional locomotives to push the coal trains up the steeper grade of the Connaught Tunnel.
How to learn without forgetting?
if you want to learn without forgetting you must go to the underground tunnel and get the jade monkey when the blue moon is out, and the dogs of hell have been set loose.
What are the names of some science tools?
# the tong which is used for picking up hot objects # the test tube which is used to hold and boil chemicals # the tripod which is used for holding objects # the crucible which is used to heat solids to high temperatures # the piperclay triangle which sits in a tripod and carries a crucible # the filter tunnel which is used to put liquids into bottles # the beaker which contains liquids and gives rough measurements to get a good idea of the many different types of laboratory equipment with out specifying a specific scientific area try various laboratory product news web sites and publications such as modern-laboratory.com although this one only lists product press releases from companies, but you get the idea. Try looking in google images for laboratory equipment :)
What is a sentence for conceivable?
"It was conceivable that a tunnel under the English Channel would be built, but not with the technology of the 19th century." "The scientists tried every conceivable method when trying to isolate the mysterious compound."
Why do scientists use indirect methods to study earth's interior?
because they don't have the tools and technology it isn't possible
What are the advantages of scanning tunneling microscopy?
Scanning tunnel microscopy has many advantages. It captures much more detail than other microscopes for better understanding of specimen. They can be used in various mediums like ultra high vacuum, air, water etc. They can work in a range of temperatures.
Who invented the scanning tunneling microscope?
a scanning tunneling microscope measures electrons that leak, or 'tunnel', fromthe surface of specimen
Who invented the tunnel microscope?
The first scanning tunneling microscope was invented in 1982 by Binnig and Rohrer. They won the Nobel Prize in Physics in 1986 for their invention.
How does wind tunnel affect the environment?
It doesn't directly. A wind tunnel is used to detect the airflow over objects such as cars and planes to improve the streamlining.
Who invented the first tunnel microscope?
The first scanning tunneling microscope was invented in 1982 by Binnig and Rohrer. They won the Nobel Prize in Physics in 1986 for their invention.
Did the TV science fiction show The Time Tunnel ever do an episode on Anastasia?
I don't recall such an episode, and after scanning the episode list in IMDb, I can't find one.
Can you see an individual atom?
We can see atoms but only through very powerful scanning tunnel microscopes and we can only see their outer shell and not whats inside. With the aid of nanothechnology we can now even arrange atoms. But we are a long time of seeing atoms beyond their shell.
What do you call the instrument that allows us to see atoms?
The instrument that allows us to see atoms is called a scanning tunneling microscope (STM). It works by scanning a sharp tip over a surface at a very close distance to detect the electrons that tunnel between the tip and the atoms.
How a scanning tunnel microscope works?
A conducting tip is brought very close to the surface of the object of interest Some electrons can "tunnel" through the space between the object and the conducting tip, creating a current. The way current varies as the tip is moved across the surface is used to determine the shape of the surface.
What is the largest tunnel used for automobiles?
Currently (2009) the longest road tunnel in the world is the Laerdal Tunnel in Norway. It is 24.5 km (15.2 miles) long. Due to its extreme length the tunnel is split into four sections separated by three larger chambers to provide an opportunity for drivers to rest. Please see the related links.
What are the best cat tunnel options available for large cats?
Some of the best cat tunnel options for large cats include the PetFusion Ambush Interactive Cat Toy, the Prosper Pet Cat Tunnel, and the PAWZ Road Cat Tunnel. These tunnels are spacious and durable, providing ample room for larger cats to play and explore.
What is bathophobia?
It's a fear of depths such as a lake or dark tunnel.
