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A drawbridge works by using a counterweight system to lift a section of the bridge vertically, creating an opening for boats to pass through. The counterweight helps balance the weight of the bridge as it is raised and lowered. This allows boats to navigate underneath the bridge without obstruction.
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What type of material does not allow light to pass through?
Rubber
What was a drawbridge used for?
Drawbridges on castles were a precaution against enemy attack because they provided the only passage in and out of moat-surrounded castles. They could be raised on chains to prevent access.Bascule bridges, commonly known as drawbridges, can open in the middle to allow passage of ships that are too tall to pass underneath the bridge. There are single-leaf and double-leaf designs depending on the size and location.
How did The Book of the Dead originate?
it is the ancient eqyptions conception of the after life it also contained spells,hymns, and instructions to allow the dead to pass through obstacales in the afterlife.
What does electric current pass easily through?
it can easily pass through a wire a conductor or a battery
What states do you pass through when you travel from North Dakota to Oklahoma?
You pass through North Dakota, South Dakota, Nebraska, Kansas, and Oklahoma. If you want to travel by Interstate, you would pass through North Dakota, South Dakota, Iowa, Missouri, Kansas, and Oklahoma.
What does a drawbridge look like?
a drawbridge looks like a bridge that separates to two parts so boats can pass through.
Why would someone build a bridge that opens up in the middle?
To allow boats and other vessels to pass through even when their height is greater than the height of the bridge.
What substances do aquaporins allow to pass through?
Aquaporins allow water molecules to pass through cell membranes.
What is a bridge that goes up and down called?
A bridge that goes up and down is called a bascule bridge. This type of drawbridge features a movable span that pivots upward to allow boats and ships to pass underneath. Bascule bridges are commonly found in areas with navigable waterways and are designed to balance their weight for efficient operation.
What is transparent translucent and opaque called?
These terms refer to the ability of a material to allow light to pass through it. Transparent materials allow light to pass through clearly, translucent materials allow some light to pass through but not clearly, and opaque materials do not allow any light to pass through.
How many boats pass through the Welland canal?
Tu cara
What happens to light when it travells through air and meets a transparant surface?
transparent surfaces, allow light to pass through, translucent surfaces allow SOME light to pass through and opaque surfaces DO NOT allow any light to pass through
What type of material always lets light pass through it?
Transparent materials will always allow light to pass through, translucent materials will allow light to pass through as well but the light rays will be scattered. Opaque materials will not allow any light to pass through.
What allows xrays to pass through?
radiolucent allows x-ray pass through radiopaque does not allow it to pass through
What is a water raising device used on rivers?
A series of Locks and Dams raise and lower water levels along a river to allow boats to pass through uneven water terrain.
Why can't a tall boat go any further up the Thames than tower bridge?
Because Tower Bridge is the only bridge to open to allow tallish boats to pass through it.
What special structures on some stems allow gases to pass through?
Lenticels allow gases to pass through them. Hope this helped. Gigi
