The resistance of a given conductor depends on its electrical resistivity (), its length(L) and its cross-sectional area (A), as follows:
In this case, we have ,
and
. So, the total resistance of the wire with length of 138m is:
How would you describe the relationship between the mass of a car and its kinetic energy?
2 answers:
Answer:
A) As the mass of a car increases, its kinetic energy increases.
Explanation:
In the graph, the mass of the car is represented on the x-axis, while the kinetic energy is represented on the y-axis. We see that as the value on the x-axis increases, the value on the y-axis increases as well: so, the kinetic energy increases as the mass increases.
More specifically, there is a direct proportionality between the two variables. In fact, the equation that relates kinetic energy and mass is:
where
m is the mass
v is the speed
K is the kinetic energy
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