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courses:phy101l:6 [2023/11/18 20:14] – asad | courses:phy101l:6 [2023/12/07 05:51] (current) – asad | ||
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===== - Introduction ===== | ===== - Introduction ===== | ||
+ | The goal of this experiment is to measure the **rate of heat transfer** of copper and steel and compare. The rate of heat transfer | ||
+ | |||
+ | $$ H = \frac{k A \Delta T}{L} $$ | ||
+ | |||
+ | where $k$ is **thermal conductivity** which has the units [W m$^{-1}$ K$^{-1}$], $A$ is the cross-sectional area of the conductor, $L$ is its length and $\Delta T$ is the difference in temperature between the two ends of the conductor. | ||
+ | |||
+ | The thermal conductivity of copper and steel are given below. | ||
+ | |||
+ | ^ Material ^ Thermal conductivity [W m$^{-1}$ K$^{-1}$] ^ | ||
+ | | Copper (Cu) | $401$ | | ||
+ | | Steel (Fe+C) | $14$ | | ||
===== - Method and data ===== | ===== - Method and data ===== | ||
+ | ==== - List of apparatus ==== | ||
+ | - Beaker | ||
+ | - Thermometer | ||
+ | - Substance (Copper, Steel) | ||
+ | - Weighing scale | ||
+ | - Water (20 ml) | ||
+ | |||
+ | ==== - Setup and Procedure ==== | ||
+ | |||
+ | Using a Vernier calipers measure the radius of the rods and from the radius ($r$) calculate $A=\pi r^2$. | ||
+ | |||
+ | Using a thread and a meter scale measure the length $L$ of the rods. | ||
+ | |||
+ | ==== - Data table ==== | ||
+ | Measure the temperature changes and note down in the following table. | ||
+ | |||
+ | ^ Time [minute] ^ Temperature of Copper [$^\circ$C] ^ Temperature of Steel [$^\circ$C] ^ | ||
+ | | 0 | | | | ||
+ | | 1 | | | | ||
+ | | 2 | | | | ||
+ | | 3 | | | | ||
+ | | 4 | | | | ||
+ | | 5 | | | | ||
+ | |||
===== - Graphical analysis ===== | ===== - Graphical analysis ===== | ||
===== - Heat transfer ===== | ===== - Heat transfer ===== | ||
+ | Compare $H_c$ and $H_s$ in units of J min$^{-1}$. | ||
===== - Discussion and conclusion ===== | ===== - Discussion and conclusion ===== | ||
courses/phy101l/6.1700363667.txt.gz · Last modified: 2023/11/18 20:14 by asad