Which of the following instruments is best for measuring the diameter of a thin constantan wire?
callipers
metre rule
micometer screw guage
vernier callipers
Correct answer is C
No explanation has been provided for this answer.
sensity
volume
specific heat capacity
electrical resistance
Correct answer is B
No explanation has been provided for this answer.
9.0 x 10-24m
4.55 x 10-17m
7.25 x 10-11m
6.20 x 10-8m
Correct answer is C
\(\lambda = \frac{hc}{\frac{1}{2}mv^2}\)
= \(\frac{6.6 x 10^{-34} \times 3 \times 10^8}{0.5 \times 9.1 \times 10^{-3} (10^7)^2}\)
= 7.25 x 10-11m
The main difference between between x-rays and \(\gamma-rays\) lies in their
ionizing ability
absorption rate
mode of production
mode of propagation
Correct answer is D
No explanation has been provided for this answer.
atomic numbers
nucleon numbers
proton numbers
neutron numbers
Correct answer is B
neutrons + protons = the nucleus or mass numbers.
U-238 has mass number(proton 92 + neutron 146=238)
U-235 has mass number (proton 92 + neutron 143 =235)