Physics - 4PH1 PearsonEdexcel

Radioactivity And Particles: Units

Muhtasari

Radioactive sources do not switch on and off like a lamp. They decay continuously, and measuring how quickly that happens requires its own set of units. A hospital physicist tracking a tracer dose and a geologist dating an ancient rock both rely on the same handful of quantities and units.

This lesson covers the units the Edexcel specification expects you to use in the Radioactivity and Particles section, from the becquerel for activity to the everyday time units that appear in half-life calculations. You will practise converting between seconds, minutes, and hours so that substitution into decay equations stays error-free.

Malengo

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

Ramani ya mawazo

Mada hii imechorwa ili uone jinsi mawazo yanavyounganika.

Fungua ramani ya mawazo kwenye programu

Kadi za kumbukumbu

Mazoezi ya haraka ya kumbukumbu kuhusu kinachopimwa katika mada hii.

Fanya mazoezi ya kadi hizi kwenye programu

Maelezo ya Somo

When a radioactive nucleus decays, it emits a particle or photon. A Geiger counter clicks each time it detects one. The number of decays happening every second tells you how active the source is, and that quantity - activity - has its own SI unit. The units in this section are few, but getting the time conversions right is critical for half-life problems, and one unit here, the centimetre, describes something quite different: how far a type of radiation can travel before it is absorbed.

Dokezo Kamili la Somo Linapatikana kwenye Programu ya Green Bridge

Pata programu ya Green Bridge CBT kwenye simu au kompyuta yako kwa maktaba kamili ya IGCSE: mitihani ya miaka iliyopita, miongozo ya usahihishaji, ramani za mawazo, kadi za marudio na masomo ya sauti.

Maelezo kamili ya masomo yenye michoro

Msaidizi wa kujifunza wa AI

Mitihani ya majaribio yenye muda, husahihishwa mara umalizapo

Pakua programu ya simu Pakua programu ya kompyuta

Inapatikana kwa Android, Windows, macOS, na Linux Programu ya iOS inakuja hivi karibuni

Tathmini ya Somo

Hongera kwa kukamilisha somo la Radioactivity And Particles: Units. 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.

What does one becquerel (Bq) represent? A) One gram of radioactive material B) One decay per second C) One count per minute D) One half-life Answer: B
How many seconds are in 2.5 hours? A) 150 B) 250 C) 1500 D) 9000 Answer: D
A source has an activity of 1600 Bq. After two half-lives, the activity is: A) 800 Bq B) 400 Bq C) 200 Bq D) 100 Bq Answer: B
What is the difference between activity and count rate? A) Activity is measured in count/s, count rate in Bq B) Activity is the true decay rate; count rate is what the detector records C) Count rate is always higher than activity D) There is no difference Answer: B
A half-life is 40 minutes. How many half-lives occur in 3 hours? A) 3 B) 4 C) 4.5 D) 7.5 Answer: C

Fanyia kazi maswali haya kwenye programu

Vitabu Vinavyopendekezwa

Pearson Edexcel International GCSE (9-1) Physics Student Book

Manukuu: First edition

Mchapishaji: Pearson Education

Mwaka: 2017

ISBN: 978-0-435-18472-2

Maelezo: Endorsed student book covering the full 4PH1 specification.

Fanya Mazoezi ya Maswali ya Majaribio

Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Radioactivity And Particles: Units? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.

Pakua Programu Kwenye Google Playstore

Kila kitu unachohitaji ili kufaulu katika JAMB, WAEC & NECO.

Msaidizi wa Gumzo wa Kujifunza wa AI Uliobinafsishwa

Maswali ya mtihani zaidi ya 200,000 ya IGCSE, JAMB, WAEC na NECO

Zaidi ya Madaftari ya Masomo 1200

Msaada Nje ya Mtandao - Jifunze Wakati Wowote, Popote Pale

Ratiba ya Daraja la Kijani

Muhtasari wa Fasihi na Maswali Yanayoweza Kutokea

Fuata Utendaji na Maendeleo Yako

Maelezo ya Kina kwa Kujifunza kwa Kina