A suitcase with measures \({8}{c}{m}{x}{48}{c}{m}\times{24}{c}{m}\) is to be covered with a tarpaulin cloth. How many metres of tarpaulin of width \({96}{c}{m}\) is required to cover 100 such suitcases?
Look at leaves of the same plant on the shady side and compare it with the leaves on the sunny side. Or, compare the potted plants kept in the sunlight with those in the shade. Which of them has leaves that are darker green? Why? Answer
State with reasons, which of the following pairs of terms are of like terms and which are of unlike terms : (i) \({7}{x},{12}{y}\) (ii) \({15}{x}-{21}{x}\) (iii) \({4}{a}{b},{7}{b}{a}\)
A 0.02 cm liquid column balances the excess pressure inside a soap bubbl of radius 7.5 mm. Determine the density of the liquid. Surface tension of soap solutionn \({0.03}{N}{m}^{{-{{1}}}}\).
The coefficient of \({x}^{{{18}}}\) in the expansion \({\left({1}+{x}\right)}{\left({1}-{x}\right)}^{{{10}}}{\left({1}+{x}+{x}^{{{2}}}\right)}^{{{9}}}\) is (A) 84 (B) 126 (C) \(-{42}\) (D) \({42}\)
A closed container of volume \({0.02}{m}^{{3}}\)contains a mixture of neon and argon gases, at a temperature of \({27}^{\circ}{C}\) and pressure of \({1}\times{10}^{{5}}{N}{m}^{{-{{2}}}}\). The total mass of the mixture is 28g. If the molar masses of neon and argon are \({20}{\quad\text{and}\quad}{40}{g}{m}{o}{l}^{{-{{1}}}}\) respectively, find the masses of the individual gasses in teh container assuming them to be ideal (Universal gas constant \({R}={8.314}{J}/{m}{o}{l}-{K}\)).
A battery of emf 2 volts and internal resistance 0.1 ohm is being charged with a current of 5 amps. In what directions will the currents flow inside the battery? What is the potential difference between the two terminal of the battery?
In post office box experiment, if \(\frac{{Q}}{{P}}=\frac{{1}}{{{10}}}\). In (R ) if \({142}\Omega\) is used then we get deflection towards right and if \({R}={143}\Omega\) , then deflection is towards left. What is the range of unknown resistance?