This document contains questions about heat transfer processes including conduction, convection, and radiation. It asks about examples of good conductors and insulators of heat. Questions cover the different modes of heat transfer in solids, liquids, and gases. Later questions discuss specific applications and examples like heat transfer in buildings and the greenhouse effect.
Class 11 important questions for physics Thermal ExpansionInfomatica Academy
Here you can get Class 11 Important Questions for Physics based on NCERT Textbook for Class XI. Physics Class 11 Important Questions are very helpful to score high marks in board exams. Here we have covered Important Questions on Thermal Expansion for Class 11 Physics subject.
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Class 11 important questions for physics Thermal ExpansionInfomatica Academy
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2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
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The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
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1. PACA FOUNDATION CLASSES
. All questions are compulsory.
PART-A
.Use appropriate answer.
Q1-In a solid, heat is transferred mainly by the process of:
(a) Conduction (b)convection
(b) Radiation (d)none
Q2-A good conductor of heat is:
(a) wood (b)asbestos
(c) air (d) mercury
Q3-In a liquid, heat is transferred mainly by:
(a)conduction (b)convection
(c) radiation (d)none
Q4-in convection, heat is transferred:
(a) upwards (b)downwards
(c) sideways (d)in all directions.
Q5-In vacuum heat is transferred by:
(a)conduction (b) convection
(c) radiation (d)none.
Q6-The fastest mode of transfer of heat:
2. (a)Radiation (b)convection
(c) conduction (d)none.
Q7-Heat loss from surface by radiation can be reduced by:
(a) keeping it in dark.
(b) blackening the surface.
(c) polishing the surface.
(d)keeping the surface in vacuum.
Q8-In a thermos flask, the vacuum between its walls reduce the heat loss by:
(a)conduction (b)convection
(c)radiation (d)conduction, convection both.
PART-B
Q1. Name the different modes of the transfer of heat.
Q2. What is good bad conductor of heat? Give two example of each.
Q3.Arraange the following in order of their increasing heat conductivity:copper,
air, water, mercury.
Q4. Explain the process of conduction in solid.
Q5.How does the process of conduction differ in metals and non metal.
PART-C
Q1-Name a metal which is a good conductor of heat.
Q2-Name a substance which is a good insulator of heat.
3. Q3- Give the list of some common substance in order of their decreasing
conductivity of heat.
Q4-In winter, a piece of iron on being touched by hand appears colder than a
piece of wood. Give reason.
Q5- when a metallic wire gauze is brought over the frame of a burner,the flame
does not pass through the wire mesh. Give reason.
Q6-Explain briefly the process of heat transfer by convection.
Q7-In a solid ,heat is not transferred by the process of convection.Give reason.
Q8-It is possible to heat a liquid or gas? Explain in your words.
Q9-Why is a room heater in a room installed near the floor of the room.
Q10-By the process convection ,heat is always transferred vertically upwards.Give
reason.
Q11-the inside of a closed car parked In the son is much warmer.Explain.
Q12-On opening the windows of a glass walled room, the insight temperature
falls. Explain.
Q13- A red hot iron wall a suspended from the celling of a room by a thin metallic
wire.
(a)Name the ways In which the ball losses heat.
(b)Name the way by which it losses the heat least, given a reason for your answer.
(c)Explain what role the air in the room plays in the loss of heat.
Q14-Name the three process of the heat transfer and distinguish between them.
Q15-What is green house effect ,name three green house gases.
Q16-what is ecosystem.
Q17-Draw carbon cycle.
