Three metal rods are heated at one end using a bunsen burner.Pins are stuck to the opposite end of the rod using petroleum jelly. When the temperature of this end of the rod increases, the petroleum jelly will melt and the pin will drop.Pin A drops first, Pin C drops second, Pin B drops third.Identify which rod has the highest thermal conductivity.Pin ___
Question
Three metal rods are heated at one end using a bunsen burner.Pins are stuck to the opposite end of the rod using petroleum jelly. When the temperature of this end of the rod increases, the petroleum jelly will melt and the pin will drop.Pin A drops first, Pin C drops second, Pin B drops third.Identify which rod has the highest thermal conductivity.Pin ___
Solution
The rod with the highest thermal conductivity is the one where the pin drops first. This is because thermal conductivity is a measure of a material's ability to conduct heat. The higher the thermal conductivity, the faster heat is transferred through the material. In this case, the heat from the Bunsen burner is transferred through the rod to the petroleum jelly. The faster this happens, the quicker the petroleum jelly melts and the pin drops. Therefore, since Pin A drops first, Rod A has the highest thermal conductivity.
Similar Questions
Rachel performed an investigation to study the thermal conductivity of four different materials. She started with four identically shaped rods—each made of a different material. Then, she placed one end of each rod into a pot of boiling water, which was at 100°C.After five minutes, Rachel measured the temperatures of the ends of the rods that were sticking up out of the pot to see whether they got hot. Her results are shown below.Thermal Conductivity InvestigationMaterial Temperature of End of RodAfter 5 MinutesMaterial 1 41°CMaterial 2 53°CMaterial 3 98°CMaterial 4 59°CRachel knows that one of the materials is copper and that copper conducts thermal energy very well. Which of the materials is most likely copper? A. material 3 B. material 2 C. material 4 D. material 1
Two rods one made of copper and other made of steel of the same length and same cross-sectional area are joined together. The thermal conductivity of copper and steel are 385Js−1K−1m−1) and 50Js−1K−1m−1, respectively. The free ends of copper and steel are held at 100°C and 0° C, respectively. The temperature at the junction is, nearly
Identify which of the following substances is most likely to be a good conductor of heat.
Which among the following metal is highest electrical conductivity as well as highest thermal conductivity?
A chemist is trying to identify a sample of metal that is listed in this table. She passes an electrical current through the sample and finds that, of the metals listed in the table, it’s one of the best conductors. Then she heats the metal to 1000°C, which is the highest temperature her heater allows. The metal doesn’t melt. Which type of metal does the chemist have?Material Melting Point (°C) Electrical Conductivity Rankingaluminum 660 3copper 1085 2zinc 420 4silver 962 1nickel 1455 5 A. aluminum B. copper C. zinc D. silver E. nickel
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.