Answer:
Explanation:
Given
The frequency of the source is
Change in frequency is
Speed of sound
Suppose is the velocity of the observer
Doppler frequency is given by
Here, the source is at rest
While approaching source, frequency is
While leaving, frequency is
The difference in the frequency is
Answer:
the amount of heat that gets through both the wires will be same.
Explanation:
By the Fourier's law of conduction we have:
where:
= rate of heat transfer
k = thermal conductivity of the material
A = area of the material
dT = temperature difference across the length dx
According to the question, the system to be analysed is isolated from the surrounding.
Until the thermal equilibrium is established between aluminium and copper wires the amount of heat that gets through both the wires will be same.
<em>But the rate of heat transfer through the aluminium will be greater as it has double the thermal conductivity of copper.</em>