Nuclear Fusion P
Gbogbo ọrọ náà
The Sun is lighter now than it was when you started reading this sentence. Not because anything fell off it, and not because it burned away: because a few million tonnes of its matter stopped being matter altogether and left as light. That exchange has been running without a pause for four and a half billion years, it is the reason the sky is bright, and the entire mechanism is four statements long.
This lesson takes those four statements apart. You will find out what has to be true of a pair of nuclei before they can join at all, why two objects carrying the same sign of charge take such extraordinary conditions to bring together, and where the released energy actually comes from, which is the one part of this topic that genuinely has no everyday parallel. You will also learn exactly what a 9203 paper can ask you to work out here and what it cannot, because the boundary is sharper on this topic than on almost any other and candidates lose marks on both sides of it.
Ebumnobi
- Nuclear fusion is the joining of two light nuclei to form a heavier nucleus.
- In this process some of the mass of the smaller nuclei is converted into energy.
- The force of repulsion between the two positive nuclei must be overcome for them to get close and fuse and this happens at very high temperatures and pressures.
- Nuclear fusion is the process by which energy is released in stars.
Maapụ uche
E seela isiokwu a ka ị hụ otu echiche si ejikọta.
Mepee maapụ uche na ngwa
Akwụkwọ Ọmụmụ
Ndetu Nkuzi Zuru Ezu di na Ngwa Green Bridge
Nweta ngwa Green Bridge CBT na ekwenti gi ma o bu kompiuta maka ulo akwukwo IGCSE zuru oke: akwukwo ule ndi gara aga, usoro nyocha, eserese uche, kaadi omumu na nkuzi olu.
Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Nuclear Fusion P. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- What is nuclear fusion? A. The splitting of a large nucleus into two smaller nuclei B. The joining of two light nuclei to form a heavier nucleus C. The emission of an alpha particle from an unstable nucleus D. The removal of electrons from an atom to form an ion Answer: B
- Where does nuclear fusion take place? A. In a Geiger counter B. In a nuclear reactor C. In a star D. In a transformer Answer: C
- Why must very high temperatures be reached before nuclear fusion can occur? A. So that the nuclei have enough energy to overcome the repulsion between them B. So that the electrons can be attracted into the nucleus C. So that the nuclei become unstable and split D. So that neutrons are released to start a chain reaction Answer: A
- In a fusion reaction, the total mass of the nuclei formed is slightly less than the total mass of the nuclei that reacted. What has happened to the missing mass? A. It has been emitted as a neutron B. It has been converted into energy C. It has been left behind as radioactive waste D. It has been shared between the surrounding electrons Answer: B
- Which statement about nuclear fusion and nuclear fission is correct? A. Fusion joins nuclei and fission splits a nucleus; both release energy B. Fusion splits a nucleus and fission joins nuclei; both release energy C. Fusion releases energy and fission absorbs energy D. Both processes join nuclei, but only fusion releases energy Answer: A
Rue ajuju ndi a n'ime ngwa ahu
Rue ajuju ndi a n'ime ngwa ahu
Akwụkwọ A Na-atụ Aro
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Nuclear Fusion P? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
Budata Ngwa Ahụ Na Google Playstore
Ihe nile ichoro iji nwee ihe ịga nke ọma na JAMB, WAEC & NECO.
