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What property determines the choice of material that is used for the inside of an electrical wire and the material that is used for the outside of the wire?
The most important property is the conductivity of the material under consideration. A high conductivity is needed for the inside, and a very low conductivity for the outside. Only after this can we consider other factors, such as cost, strength, toxicity, flammability, flexibility, corrosion resistance and ease of making and shaping.
What are two key substances that must be present for conduction?
Two key substances needed for conduction are electrons and a conductive material. Electrons serve as the charge carriers that move through the material, while the conductive material provides a pathway for the electrons to flow.
Is there a material that dynamite or TNT cannot destroy?
There is no material that is completely impervious to the destructive force of dynamite or TNT. While certain materials may offer resistance or be more resilient to the explosive impact, the level of destruction ultimately depends on the quantity and placement of the explosive in relation to the material.
Is wire metal?
Metal wires are single strands of flexible material often used to carry electrical currents, telecommunication signals, and hold mechanical loads.
Why rubbing lead pencil on a key makes it turn in the lock?
Rubbing lead pencil on a key leaves a layer of graphite on its surface, which acts as a lubricant. This reduces friction between the key and the lock mechanism, making it easier to turn the key.
What identifies symbols on a map?
A map key
What identifies different symbols on a map and what they represent?
the key or legend
Is opaque a solid color?
No, opaque refers to a material or surface that does not allow light to pass through it. It can be a solid color or have patterns, but the key characteristic is that it is not transparent.
What key identifies the large number of living things spider key or numbered key?
numbered key
What identifies the slices in a pie chart?
A legend or key.
What is A field that uniquely identifies a particular record in a table called?
A field that uniquely identifies a particular record in a table is called a primary key. The field or fields on which records are sorted is called the sort key.
The field that uniquely identifies a record in a table is called?
The field that uniquely identifies a record in a table is called the primary key. It ensures that each record in a table is distinct and can be easily located and referenced.
primary key?
attribute of an entity which uniquely identifies a specific instance of the data
What identifies patterns and colors assigned to categories in the chart?
It is called the "key".
Which property is not important when selecting a material to use as a light bulb filament?
Color of the material is not important when selecting a material for a light bulb filament. The key properties to consider are electrical conductivity, melting point, and heat resistance.
Which property is not important when selecting a material use as a light bulb filament?
High vapor pressure
In a database a field that uniquely identifies a particular record in a table is called?
In a database, a field that uniquely identifies a particular record in a table is called
