wiz-icon
MyQuestionIcon
MyQuestionIcon
5
You visited us 5 times! Enjoying our articles? Unlock Full Access!
Question

If we completely annihilate a hair of your body that has a mass of 1 μg, how much energy will we get in the process?

A
9×107 J
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
8×107 J
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
9×1010 J
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
8×1010 J
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A 9×107 J
Einstein's theory says that if we have a mass m then it's rest mass energy E is related to it by m=Ec2. Hence if we annihilate a mass m, according to this equation, the amount of energy that we'll get is E = mc2.
Now, we have a mass of 1 μg.
Hence, the mass energy E=109×(3×108)×(3×108) J = 9×107 J

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Mass - Energy Equivalence
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon