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materials and density - Coggle Diagram
materials and density
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how can particle arrangment be used to explain the differneces in density between,soilds,liquids and gases
If we consider the same volume of a substance in its solid, liquid and gaseous forms then there will be much
more space between the particles in a gas than in a liquid or solid. This means that if we had the same
volume we would have much less mass of gas. Since density = mass/volume then it follows that the density of
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What is the relationship between force,
spring constant, and extension?
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Force (Newtons, N), Spring constant (Newtons per metre, N/m), Extension (metres, m)
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What is a linear and non-linear relationship
between two quantities?If a graph is plotted and the line of best fit is straight then we say that there is a linear relationship
between the two quantities on the x and y axes. If the line is not straight then it is non-linear.
What is meant by a directly proportional
relationship between two quantities?If a graph is plotted and the line of best fit is straight and goes through the origin then there is a
directly proportional relationship between the two quantities.
What is the spring constant?The spring constant is the amount of force needed to stretch (or compress) a material by 1 m. Its unit is N/m.
How do you determine spring constant from
a force extension graph?The spring constant is the gradient of the straight part of a force-extension graph when force is on
the y-axis and extension on the x-axis.
What is Hooke’s law?The extension of a material is directly proportional to the force applied up to the limit of proportionality (elastic limit)
On a force extension graph where is the limit
of proportionality?The limit of proportionality on this graph is where the line stops being straight. It is the point at
which it begins to curve.
What is meant by elastic deformation?An object which is stretched (or compressed) will return to its original length when the force is
removed if it hasn’t passed the limit of proportionality.
What is meant by inelastic deformation?An object which is stretched (or compressed) will not return to its original length when the force is
removed if it has passed the limit of proportionality. There will be permanent deformation.
How do you measure the mass of
an object accurately?Place a digital balance on a flat surface and zero it (press the tare button) before placing the object on it.
What do we mean by “uncertainty”
in a measurement?Uncertainty is the range of values in which we expect the true value of a measurement to lie.
when a measurement is reapted what is the uncertainty in that measurement?When measurements are repeated the uncertainty in the measurement is 1⁄2 of the range. The range can be
found by taking the minimum value from the maximum
Why does density change when a
substance changes state?When a substance changes state the same mass of substance will now occupy a different volume. Since
density = mass/volume it follows that density will change since volume changes.
When a substance changes state the same mass of substance will now occupy a different volume. Since
density = mass/volume it follows that density will change since volume changes.When a substance changes state the same mass of substance will now occupy a different volume. Since
density = mass/volume it follows that density will change since volume changes.