Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Physics
Physics
Problem
You are given that mass of
3
7
Li
=
7.0160
u
{}^7_3\text{Li} = 7.0160 \text{ u}
3
7
Li
=
7.0160
u
, Mass of
2
4
He
=
4.0026
u
{}^4_2\text{He} = 4.0026 \text{ u}
2
4
He
=
4.0026
u
and Mass of
1
1
H
=
1.0079
u
{}^1_1\text{H} = 1.0079 \text{ u}
1
1
H
=
1.0079
u
. When 20 g of
3
7
Li
{}^7_3\text{Li}
3
7
Li
is converted into
2
4
He
{}^4_2\text{He}
2
4
He
by proton capture, the energy liberated, (in kWh), is : a.
4.5
×
10
5
4.5 \times 10^5
4.5
×
1
0
5
b.
8
×
10
6
8 \times 10^6
8
×
1
0
6
c.
6.82
×
10
5
6.82 \times 10^5
6.82
×
1
0
5
d.
1.33
×
10
6
1.33 \times 10^6
1.33
×
1
0
6
Browse the problem library