Science Double Award - 4SD0 PearsonEdexcel

Physics: Radioactivity And Particles: Units

Akopọ

Radioactivity calculations use time and activity, so you need to be comfortable converting between seconds, minutes and hours, and you need to understand the becquerel as the unit of radioactive decay rate.

This reference covers the five units for the radioactivity section of the Edexcel specification: becquerel, centimetre, hour, minute and second.

Awọn Afojusun

  1. Use the following units: becquerel (Bq), centimetre (cm), hour (h), minute (min) and second (s)

Akọ̀wé Ẹ̀kọ́

Unlike most physics sections, radioactivity introduces a new unit - the becquerel - specifically for measuring how many nuclei decay each second. The section also uses centimetres (for penetration distances) and multiple time units because half-lives range from fractions of a second to billions of years, and both decay-rate calculations and penetrating-power experiments turn up in exam questions built entirely around these five units.

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Oriire fun ipari ẹkọ lori Physics: Radioactivity And Particles: Units. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.

Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.

Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.

  1. One becquerel is equal to: A) 1 decay per minute B) 1 decay per second C) 1 decay per hour D) 100 decays per second Answer: B
  2. A source has a half-life of 30 minutes. After 90 minutes the activity will have decreased to: A) 1/2 of the original B) 1/4 of the original C) 1/8 of the original D) 1/16 of the original Answer: C
  3. The unit used to measure the thickness of an absorber in a radiation experiment is: A) metre B) centimetre C) millimetre D) kilometre Answer: B
  4. How many seconds are in 1.5 hours? A) 90 B) 900 C) 5400 D) 9000 Answer: C
  5. Activity is measured in: A) Coulombs B) Hertz C) Becquerels D) Watts Answer: C

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O wa lori ohun elo Green Bridge

Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.

Awọn akọsilẹ ẹkọ ni kikun pẹlu awọn aworan apejuwe
Oluranlọwọ ẹkọ ti AI ṣe agbara rẹ
Kọ ẹkọ laisi intanẹẹti, nigbakugba, nibikibi
O wa lori Android, Windows, macOS, ati Linux

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