Yes. It means that the acceleration increases at a constant rate, for example 3 mph every second.
The characteristics of thermal expansion allow finding that the response for a material without thermal expansion is
- The length variation is zero
- In the graph the line is horizontal so there is no change in length with temperature
Thermal expansion is the macroscopic sum of the changes in the length of the bonds when the energy (temperature) changes, it can be written
ΔL = α L₀ ΔT
Where ΔL is the change in length, α the coefficient of linear expansion, L₀ the initial length and ΔT the change in body temperature
In this case, a material is being designed that the thermal expansion is very small, for this the material must be made up of several compounds where some of them present a contraction with temperature, some examples: water at low temperature, liquefied gases , ceramic tile, quartz, etc.
The thermal expansion measurement processes control the body temperature and measure the change in length, in this case the change in length must be zero, in the attachment we can see a graph of a composite material with these characteristics, an example of this type of material is Invar an alloy of nickel and iron α = 3.7 10⁻⁶ ºC⁻¹
In conclusion, using the characteristics of thermal expansion we can find that the response of material without thermal expansion is
- The length variation is zero
- In the graph the line is horizontal so there is no change in length with temperature
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Answer:
D.) will not move unless acted on by another force
Explanation:
This is well-explained by Newton's first law, also called "Law of inertia", which states that:
"an object in state of rest (or in state of motion with constant speed) will remain at rest (or will continue moving with constant speed) unless acted upon an unbalanced force".
In the situation described in the problem, we have a bowling ball at rest on the table. The ball is acted upon two balanced forces: the force of gravity, downward, and the normal reaction of the table, upward. According to the First Newton Law that we mentioned above, the ball will remain in its state of rest unless it will be acted upon another unbalanced force that can accelerate it.