Transfer Of Thermal Energy Continued
Muhtasari
A metal spoon left in a hot drink soon burns your fingers, warm air rises from a radiator to fill a room, and you feel the Sun's heat across empty space. These are the three ways thermal energy travels: conduction, convection and radiation. Knowing which one is at work, and often more than one at once, lets you explain almost every heating and cooling effect around you.
In this lesson you will explain everyday applications of conduction, convection and radiation, from cooking pans to heating a room. You will describe experiments that distinguish good and bad emitters and absorbers of infrared radiation, see how surface temperature and area control the rate of radiation, and explain complex cases such as a coal fire and a car radiator where more than one transfer matters.
Malengo
- Explain some of the basic everyday applications and consequences of conduction, convection and radiation, including: (a) heating objects such as kitchen pans (b) heating a room by convection
- [Supplement] Describe experiments to distinguish between good and bad emitters of infrared radiation
- [Supplement] Describe experiments to distinguish between good and bad absorbers of infrared radiation
- [Supplement] Describe how the rate of emission of radiation depends on the surface temperature and surface area of an object
- [Supplement] Explain some of the complex applications and consequences of conduction, convection and radiation where more than one type of thermal energy transfer is significant, including: (a) a fire burning wood or coal (b) a radiator in a car
Maelezo ya Somo
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Tathmini ya Somo
Hongera kwa kukamilisha somo la Transfer Of Thermal Energy Continued. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- Which method of thermal energy transfer can take place through a vacuum? A. conduction B. convection C. radiation D. none of these Answer: C
- A saucepan handle is made of plastic mainly because plastic is a A. good conductor B. good emitter C. poor conductor D. good absorber Answer: C
- Warm air rises from a heater because, when heated, the air becomes A. more dense B. less dense C. heavier D. cooler Answer: B
- Which surface is the best emitter of infrared radiation? A. shiny silver B. shiny white C. dull black D. polished metal Answer: C
- The rate at which an object emits radiation increases if its A. surface temperature falls B. surface area decreases C. surface temperature rises D. colour becomes shinier Answer: C
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Vitabu Vinavyopendekezwa
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Transfer Of Thermal Energy Continued? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
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