0.8rad\(s^{-1}\)
2 rad\(s^{-1}\)
4 rad\(s^{-1}\)
8 rad\(s^{-1}\)
16 rad\(s^{-1}\)
Correct answer is C
V=rw, 8=2w, w=8/2= 4rad/s
0\(cm^3\)
9\(cm^3\)
10\(cm^3\)
90\(cm^3\)
100\(cm^3\)
Correct answer is C
V = \(\frac{m}{p} \, ice volume= 90 cm^3;water volume =100 cm^3\\
Volume change = (100-90) cm^3= 10 cm^3\)
0.02N
0.08N
0.20N
0.80N
1N
Correct answer is D
Upthrust = weight of the water displaced =pvg= 1000 x 2 x \(10^{-5}\)=0.20N \\ Apparent weight = weight in air – upthrust = 1-0.2N=0.8N
\(2.5\times10^{-7}\)m
\(3.8\times10^{-7}\)m
\(4.6\times10^{-7}\)m
\(5.2\times10^{-7}\)m
\(6.1\times10^{-7}\)m
Correct answer is B
n =\(\frac{wavelength\, in\, air}{wavelength\, in \,medium}= \frac{5.9\times10^{-7}}{1.54}= 3.8\times10^{-7}\)m
2.5 minutes
5.7 minutes
6.7 minutes
7.5 minutes
9.5 minutes
Correct answer is C
t = \(\frac{mc\theta}{p}= \frac{2\times4200\times50}{210\times5} \\ = 400s = 6.7\)