R = Thermal Resistance (l / k A) l = Length of a material in Meters. 2-6 Aim :- To determine thermal conductivity of metal rod. By creating a chart like this, we can see which metal transfers the most heat overall. Metals includes are Copper (Cu), Iron (Fe), Brass (Br), and Aluminum (Al). EN. Conclusion: Of the three metals, the rate of conduction is highest for copper and the lowest for iron. Heat flow down a metal rod (or rods) is timed by seeing wax melt at different locations along the rod. How does an Electroscope Work? Space the metal rods out around the circle of students, and ask the students to touch a metal rod and feel how warm it is. 5 W m 1 K 1, Latent heat of . This KS3 Physics practical is a great way for students to explore how energy is transferred through metal rods by conduction. Step 4 - Carefully pour hot boiling water into the bowl until it is almost completely full. The rod is made of iron, is 20 cm in length and 2.25 cm in diameter. 2. See diagram 23.1.4: Conduction of heat by different metals. There are two Conduction in Metal Rods worksheets provided, one with questions to help students analyse their results and another with space for students to record their results and conclusion. 2. AIM: To observe conduction along a metal rod. 2. Abstract. The time taken for the wax droplet to fall will give an indication as to the conduction of the metals. 11. Adult supervision recommended. Q = Heat flow in Watts. The rod or fin temperature distribution can be derived from an energy balance on a differential element of the object. Heat Conduction Through Iron Rod. Use an iron rod, copper rod and glass rod that are the same length and diameter. This experiment will vary the bolded constant via different samples. Put the paper on a bunsen mat which is resting on top of a tripod. small nails, candle Procedure Take a rod or flat strip of a metal, say of aluminium or iron. Zirconium alloy (e.g., Zr + 1%Nb) is widely used as a cladding for nuclear reactor fuels. Make Paper flame-proof using only a metal rod. Suitable for KS3 and KS4. Thermal Conductivity Of Metal Rod. The temperature of the bar is measured along the length at six locations using thermocouples while the radial temperature distribution is measured by separate thermocouples at two different . T = Temperature difference in Degrees Celsius. There are two worksheets provided, one with questions to help students analyse their results and another with space for students to record their results and conclusion. Title THERMAL CONDUCTIVITY OF METAL ROD EXP. With regard to residential heating, the heat is transferred by conduction through solids like walls . To determine the co-efficient of thermal conductivity of the metal (copper). Thousands of new, high-quality pictures added every day. Show Step-by-step Solutions . Metal bar - Copper, 25 mm O.D., approx. Example of Conduction. 5. Worksheet for students to complete when carrying out a conduction practical using different metal rods, vaseline and drawing pins. Contains four metal strips fixed to a metal ring. [1] An empirical relationship between the conduction rate in a material and the test tube with water. Range of Experiments to be Carried Out. Learn more now. Metals are excellent conductors of heat and electricityheat energy and electrons travel very quickly through them. . at one time , the temperature gradient is 5. All Products. If the end of metal rod is heated, then the rate of flow of heat does not depend on : A hollow metal cube, with side 0. pptx, 1.96 MB. k = Thermal conductivity constant in W/m-K. A = Surface area in meters squared. The molecules quickly heat up at the point where the flame touches the rod. Thermal Conductivity of Zirconium. The metal rods were covered by aluminum foil to prevent heat from escaping to the environment. Ta is the temperature . Experiments 1. Each metal strip is 5" long and 0.75" wide with an engraving for easy identification. Step 1 - Begin by positioning 3 spoons in a small glass bowl. At least 12 inches long metal rod that can be made up of either steel, brass or copper. The governing equations are derived and are confirmed. A metal rod of cross sectional area 1. Test length of the bar - 240 mm. When a However, materials such as plastic, wooden, and metal silverware will do. Heat Conduction 1. There are two ways to charge an electroscope - by induction or conduction. The heat then spreads across the entire metal rod and the heat is then able to be felt by the hand. Gently heat the join. Part of NCSSM CORE collection: This video shows the heat conductivity of different metals. EQUIPMENT: A metal rod, retort stand and clamp, Bunsen burner, petroleum jelly, 5-10 drawing pins or small pebbles, a stopwatch. Repeat phase 1 using the second rod of unknown length (important note: ensure the same area of aluminum rod is exposed to the hot water bath) Acquire the new T 1 - T2; Using the previously calculated heat flux, thermal conductivity constant and new T 1 - T2 calculate the length of the aluminum rod with the heat flux equation rearranged for Email: webshopuk@ld-didactic.de Telephone:+49 (0) 22 33 / 604 - 319 Go to contact form From data collected, the thermal conductivity measurement apparatus reached its steady state at 70 th minute where the increment of previous reading to the next reading is about +0.2 as per stated by the module. Based around students performing experiment in which they observe conduction along a heated metal rod. Lay all the rods on the paper with one end of each rod meeting. Smear a small amount of petroleum jelly on to the head of each drawing pin. The experiment was successfully done and the thermal conductivity of metal rod was calculated and graph is plotted based on its value. Conduction: If one end of a metal rod is heated, the other end also gets heated up. By increasing the temperature at various heat supply (2.5 W, 4.0 W, 6.0 W and 8.0 . Band Nichrome heater to heat the bar. Join Telegram group for new books and updates Here Email. II. When it is charged by induction, the metal disc acquires an opposite charge to the rod, and lower down, the metal leaves acquire the same charge as the rod. Conducting Heat Science Experiment Instructions. 23.7.3 Conduction of heat by different metals, feel heat energy See: Conductivity, Solids, (Commercial). docx, 107.26 KB. As an extension exercise you could include another investigation in which you measure the rate of energy conduction along a metal rod. 3. III. A rod made of half copper and half wood is wrapped in paper. Follow the method included, or have students write their own. Gather up the rods, briefly dip them in the kettle of recently boiled hot water, then lay out again. and. Experiment-3 AIM:-THERMAL CONDUCTIVITY OF METAL ROD INTRODUCTION : Thermal conductivity is the physical property of the material denoting the ease with a particular substance can accomplish the transmission of thermal energy by molecular motion. If you cannot secure the metal rod to the Bunsen burner, you will also need heat resistant gloves. Identify the best and worst conductors in the group. Heat Transfer Liquids. I. INTRODUCTION: Thermal conductivity is the physical property of the material denoting the ease with which a particular substance can accomplish the transmission of thermal energy by molecular motion. http://www.dlt.ncssm.eduPlease attribute this work as being create. METHOD: 1. This is an excellent tool to use in thermal conductivity experiments. Obtain objects of different materials. Navbar. Thermal conducting or heat conduction is an important subject under the broad topic of heat transfer, and it mainly coves all phases of materials, that is, gases, liquids and solids. Find the thermal conductivity of the metal Bar. 1 H. T. Lab Semester-6th Page No. A hand holds a metal rod above a lit candle. Conduction Experiment Experiment based on the heat energy transformation of conduction Thermal Conduction Demonstration Record the time belonging to each metal rod from the screen and draw a table. Experiment to Demonstrate the Difference in Conduction of Metals . MP-1 with TPS Transient Plane Source; MP-1 with THW Transient Hot Wire; . Put the handles of the knives into the About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators . . To measure the temperature gradient along the length of the metal (copper) rod. She puts a metal disc on top of the ice to stop the ice from floating. Subscribe NO. This was done by calculating the heat supplied to silver metal rod with a known thermal conductivity of 428 W/m.K. When exposed to flame the wood side burns and the copper side does not. This experiment focus on the heat conduc conductio tion n for the cylind cylindric rical al metal metal bar arrang arrangeme ement. You can experiment with both heat and electricity conduction using items from around your house. Step 3 - Put a bead in each pat of butter. As heat moves along the rod, its temperature increases and the wax melts. It involves some long thin strips of different metals (eg steel, aluminium and copper . 23.7.3 Conduction of heat by different metals, feel heat energy See: Conductivity, Solids, (Commercial). The experiment is set up as shown in the diagram using identical size metal rods and wax droplets. Q1 Q2 Q3 Ta Ts x x x = 0 T (x) Figure 1 Energy balance for a differential element of the rod where Ts is the temperature of the rod at x = 0. Data Table: Time (minutes) Positions 10 20 30 40 50 60 70 80 90 100 110 120 0 inch . Experiments 1. The thermal conductivity of the wood is set at 0.1 Watts per meter Kelvin (W/m-K) and the metal at 1 Watts per meter Kelvin (W/m-K). 1 1.0 ABSTRACT The main objective of this experiment is to study the heat transfer through the conduction in metal rod and also to find out the thermal conductivity of the metal rod. | Find, read and cite all the research . Outer Diameter of metal ring is 4.5". Stove Water A burner to boil the water. Observation: You will see that the balls drop fastest for copper, then aluminium and slowest for iron. Four digital thermometers Procedure Fill a large container with water and ice cubes and allow the water to cool for an hour. Thermal conductivity and thermal resistivity. 2. This KS3 physics practical is a great way for students to explore how energy is transferred through metal rods by conduction. Dimmer stat to control the heat input - 2A, 230 V. 6. These are labeled on the hub, respectively, "NI," "NIAG," "FE," "FE," "CU," "BR," and "AL." to the ends of the rods by means of wax are small steel balls. Type of Material = Aluminium Diameter of the metal rod = 50mm Test length of the metal rod = 200mm Distance between two consecutive thermocouples = 50mm Distance between First end and first thermocouple, last thermocouple and last end = 25mm Thermocouple type-K type (Cr-Al) Maximum voltage and current range=150 V CALCULATIONS: