Search results for "Radioactive Decay"

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Physics

CAIE2024

693 decay constant λ = t

Question

Physics

CAIE2024

(a) Radioactive decay is both random and spontaneous. (i) State what is meant by random. ........................................................................................................................................... ..................................................................................................................................... [1] (ii) State what is meant by spontaneous. ........................................................................................................................................... ..................................................................................................................................... [1] (iii) State one piece of evidence for the random nature of decay. ........................................................................................................................................... ..................................................................................................................................... [1] (b) (i) Describe the differences between nuclear fission and nuclear fusion. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ..................................................................................................................................... [3] (ii) Explain, with reference to the variation of binding energy per nucleon with nucleon number, why the processes of nuclear fission and nuclear fusion both result in a release of energy. ........................................................................................................................................... ........................................................................................................................................... ..................................................................................................................................... [2] [Total: 8] (cid:300)(cid:211)(cid:266)(cid:190)(cid:288)(cid:180)(cid:237)(cid:200)(cid:245)(cid:207)(cid:298)(cid:197)(cid:266)(cid:221)(cid:251)(cid:182)(cid:258)(cid:215) © UCLES 2024 (cid:300)(cid:236)(cid:186)(cid:252)(cid:212)(cid:293)(cid:250)(cid:263)(cid:210)(cid:240)(cid:254)(cid:282)(cid:265)(cid:295)(cid:241)(cid:201)(cid:280)(cid:258) 9702/42/O/N/24 (cid:293)(cid:245)(cid:213)(cid:213)(cid:245)(cid:213)(cid:229)(cid:213)(cid:197)(cid:213)(cid:181)(cid:197)(cid:261)(cid:245)(cid:261)(cid:181)(cid:261)(cid:213) NIGRAM SIHT NI ETIRW TON OD NIGRAM SIHT NI ETIRW TON OD NIGRAM SIHT NI ETIRW TON OD NIGRAM SIHT NI ETIRW TON OD NIGRAM SIHT NI ETIRW TON OD PMT * 0000800000024 *

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Physics

CAIE2024

radioactive decay x = x e– λt

Question

Physics

CAIE2024

693 decay constant λ = t

Question

Physics

Edexcel2024

Capacitance Q C = V  PMT Nuclear and particle physics Radioactive decay A = λN In a magnetic field dN p = −λN r = dt BQ ln 2 λ = t ½ Thermodynamics N = N e−λt Heating 0 A = A e−λt

Question

Physics

CAIE2024

radioactive decay x = x e– λt

Question

Physics

CAIE2024

radioactive decay x = x e– λt

Question

Physics

CAIE2023

2 alternating current/voltage x = x sinωt o radioactive decay x = x exp(-λt) o

Question

Physics

CAIE2023

693 decay constant λ = t

Question

Physics

Edexcel2023

D t = T ln 2 (Total for Question 3 = 1 mark)

Question

Physics

Edexcel2023

Capacitance Q C = V *P71915A02628* DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA AERA SIHT NI ETIRW TON OD AERA SIHT NI ETIRW TON OD AERA SIHT NI ETIRW TON OD PMT Nuclear and particle physics Radioactive decay A = λN In a magnetic field dN p = −λN r = dt BQ ln 2 λ = t ½ Thermodynamics N = N e−λt Heating 0 A = A e−λt

Question

Physics

Edexcel2022

*P69306A02728* PMT Nuclear and particle physics Radioactive decay A = λN In a magnetic field dN p = −λN r = dt BQ ln 2 λ = t ½ Thermodynamics N = N e−λt Heating 0 A = A e−λt

Question

Physics

Edexcel2021

*P67096A03132* PMT Nuclear and particle physics Radioactive decay A = λN In a magnetic field dN p = −λN r = dt BQ ln 2 λ = t ½ Thermodynamics N = N e−λt Heating 0 A = A e−λt

Question

Physics

Edexcel2020

*P61864RA02828* PMT Nuclear and particle physics Radioactive decay A = λN In a magnetic field dN p = −λN r = dt BQ ln 2 λ = t ½ Thermodynamics N = N e−λt Heating 0 A = A e−λt

Question

Physics

CAIE2016

78 MeV. (a) (i) State what is meant by the decay constant of a radioactive nucleus. ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [2] (ii) Suggest, with a reason, which of the two isotopes has the larger decay constant. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [3] (b) Radium-224 has a half-life of 3.6 days. (i) Calculate the decay constant of radium-224, stating the unit in which it is measured. decay constant = .......................................................... [2] (ii) Determine the activity of a sample of radium-224 of mass 2.24 mg. activity = .................................................... Bq [4] [Total: 11] Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity. Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge. © UCLES 2014 9702/04/SP/16

Question

Physics

CAIE2016

radioactive decay x = x exp(–(cid:79)t)

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