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Chapter 1: Problem 14
Nucleus of molecule is made up of which fundamental constituents? (a) only Electron (c) Electron and Proton (b) Proton and neutron (d) Electron and neutron
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The area of a rectangle of size \(1.25 \times 2.245 \mathrm{~cm}\) in significant figure is ......... (a) \(2.80625 \mathrm{~cm}^{2}\) (b) \(2.81 \mathrm{~cm}^{2}\) (c) \(2.806 \mathrm{~cm}^{2}\) (d) \(2.8062 \mathrm{~cm}^{2}\)
If $\mathrm{P}=\left[\left(\mathrm{A}^{2} \mathrm{~B}\right) /\left(\mathrm{C}^{3}\right)\right]\( where percentage error in \)\mathrm{A}, \mathrm{B}\( and \)\mathrm{C}$ are respectively \(\pm 2 \% \pm 3 \%\) and \(\pm 5 \%\) then total percentage error in measurement of \(\mathrm{p}\) (a) \(18 \%\) (b) \(14 \%\) (c) \(21 \%\) (d) \(12 \%\)
If the centripetal force is of the form $\mathrm{m}^{\mathrm{a}} \mathrm{v} \mathrm{b}_{\mathrm{r}}^{\mathrm{c}}$ find the values of \(\mathrm{a}, \mathrm{b}\) and \(\mathrm{c}\) (a) \(1,2,1\) (b) \(1,2,-1\) \(\begin{array}{ll}\text { (c) } 1,3,-2 & \text { (d) }-1,3,-1\end{array}\)
Find the distance at which 4 AU would subtend an angle of exactly 1 " of arc. $\left[1 \mathrm{AU}=1.496 \times 10^{11} \mathrm{~m}, 1^{\prime \prime}=4.85 \times 10^{-6} \mathrm{rad}\right]$ (a) \(1.123 \times 10^{5} \mathrm{~m}\) (b) \(11.23 \times 10^{5} \mathrm{~m}\) (c) \(1.123 \times 10^{17} \mathrm{~m}\) (d) \(11.23 \times 10^{17} \mathrm{~m}\)
What is the number of significant figures in \(5.50 \times 10^{3}\) ? (a) 2 (b) 7 (c) 3 (d) 4
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