Processing math: 100%

Home / Aptitude Tests / Physics / After three half lif...

After three half lifes, the fraction of a radioactive mat...

After three half lifes, the fraction of a radioactive material that has decayed is

A.

$\frac{1}{8}$

B.

$\frac{1}{3}$

C.

$\frac{2}{3}$

D.

$\frac{7}{8}$

View answer & explanation

Correct answer is D

I = $\frac{1}{2}$ $\Rightarrow$ $\frac{1}{4}$ $\Rightarrow$ $\frac{1}{8}$

Fraction decayed = 1 - $\frac{1}{8}$

= $\frac{7}{8}$

See all Physics questions & answers

See more JAMB questions & answers

Similar Questions

Which of the following pairs is NOT part of the electromagnetic spectrum? i. Radio waves. ii. Be...

If the volume of a gas is recorded as 76cm3 at a temperature of 27°C with a pressure of 800mmHg....

Calculate the refractive index of the material for the glass prism in the diagram above ...

A process by which two light atoms join to form a new atom of higher atomic mass is ...

An object is placed in front of a converging lens of a focal length 20cm. The image is virtual and h...

A circuit has a resistance of 200Ω. The resistance of the circuit can be reduced to 120Ω when ...

The dimensions of momentum are ...

The speed of light in vacuum is 3.0 x 108ms-1. If the refractive index of a transparent liquid is \(...

A balloon containing 546cm3 of air is heated from 0oC to 10oC. If the pressure is kept constant, wha...

Which of the following statements about sound is NOT true? ...

Aptitude Tests

Numerical Reasoning Questions and Answers

Personality Test

Data Interpretation Questions and Answers

Typing Speed and Accuracy Test

Puzzles Questions and Answers

Abstract Reasoning Questions and Answers

Quantitative Reasoning Questions and Answers

Nigeria General Knowledge Questions and Answers

Situational Judgement Questions and Answers

Verbal Reasoning Questions and Answers

Spatial Reasoning Questions and Answers

Logical Reasoning Questions and Answers

Microsoft Office Questions and Answers

View latest jobs in Nigeria today