II and IV
I and II
I and III
II and III
Correct answer is A
No explanation has been provided for this answer.
A quantity which requires magnitude and direction to be specified is
Temperature
Distance
Displacement
Mass
Correct answer is C
Displacement is a vector quantity
What is the least possible error encountered when taking measurement with a meter rule?
0.1mm
1.0mm
0.5mm
0.2mm
Correct answer is C
No explanation has been provided for this answer.
1.32 x \(10^{-6}\)m
2.98 x \(10^{-6}\)m
3.32 x \(10^{-6}\)m
6.82 x \(10^{-6}\)m
8.01 x \(10^{-6}\)m
Correct answer is A
\(E=\lambda v=\frac{hc}{\lambda}\Rightarrow\lambda=\frac{hc}{E}={6.6 \times10^{-34}\times3\times10^8}{1.5\times10^{-19}}\\=1.32\times10^{-6}\)
9 x \(10^{7}\)J
1.8 x \(10^{8}\)J
1.8 x \(10^{9}\)J
9 x \(10^{-10}\)J
3.6 x \(10^{11}\)J
Correct answer is B
E=\(mc^2 = 2\times10^{-6} \times10^{-3}\times(3\times10^{8})^2=1.8\times10^{8}\)