SATHEE: Nuclei - Result Question 21

Nuclei - Result Question 21

23. The energy equivalent of $0.5 g$ of a substance is :

(a) $4.5 \times 10^{13} J$

(b) $1.5 \times 10^{13} J$

(d) $4.5 \times 10^{16} J$

[2020]

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Answer:

Correct Answer: 23. (a)

Solution:

(a) From the Einstein’s mass-energy equivalence, the relation between the mass of a substance $m$ and its energy $E$ is

$E = m c^{2}$

Here, $c =$ speed of light

$\begin{aligned} ∴ E & = 0.5 \times 10^{- 3} \times (3 \times 10^{8})^{2} = 0.5 \times 10^{- 3} \times 9 \times 10^{16} \\ = 4.5 \times 10^{13} J . \end{aligned}$

Nuclei - Result Question 21

23. The energy equivalent of $0.5 g$ of a substance is :

Answer:

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Nuclei - Result Question 21

23. The energy equivalent of 0.5g of a substance is :

Answer:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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23. The energy equivalent of $0.5 g$ of a substance is :