Question 11 MarkHow will you determine the volume of a cuboid ? Write the formula you will use.AnswerVolume of a cuboid = length × breadth × height.View full question & answer→
Question 21 MarkWrite the S.I. unit of speed.AnswerThe S.I. unit of speed is metre/second or metre per second. Its symbol is $m s ^{-1}$.View full question & answer→
Question 31 MarkWrite the density of water at $4^{\circ} C$AnswerThe density of water at $4^{\circ} C$ is $1.0 g cm ^{-3}$, or $1,000 kg m ^{-3}$View full question & answer→
Question 41 MarkHow does the density of water changes when it is heated from 4°C to 10°C ?AnswerThe density of water is maximum at 4°C. It decreases when it is cooled from 4°C to 0°C or it is heated above 4°CView full question & answer→
Question 51 MarkHow does the density of water changes when it is heated from 0°C to 4°C,AnswerWater contracts on heating from 0°C to 4°C and expands on heating above 4°C.View full question & answer→
Question 61 MarkArrange the following substances in order of their increasing density:(a) iron(b) cork(c) brass(d) water(e) mercuryAnswer(b) cork, (d) water, (a) iron, (c) brass, (e) mercuryView full question & answer→
Question 71 Mark‘The density of brass is $8.4 g cm’3$’. What do you mean by the statement ?AnswerDensity of brass is $8.4 g cm ^{-3}$. This means that unit volume of brass contain 8.4 g mass.View full question & answer→
Question 81 MarkDefine the term volume of an object.AnswerThe space occupied by an object is called its volume.View full question & answer→
Question 91 MarkExpress $36 km h ^{-1}$ in $m s ^{-1}$Answer $\begin{aligned} 36 \mathrm{~km} \mathrm{~h}^{-1}= & \frac{36 \times 1000 \mathrm{~m}}{60 \times 60} \\ & =10 \mathrm{~m} \mathrm{~s}^{-1}\end{aligned}$View full question & answer→