146545 Rail line is being laid at $0^{\circ} \mathrm{C}$ with metal beams of length $10 \mathrm{~m}$ each and of material having coefficient of linear expansion $11 \times 10^{-6} /{ }^{\circ} \mathrm{C}$. How much gap has to be kept between consecutive beams is maximum temperature at that place is $50{ }^{\circ} \mathrm{C}$ ?

146547 The coefficient of volume expansion of a material is $5 \times 10^{-4}{ }^{\circ} \mathrm{C}^{-1}$. The fractional change in its density for a $40^{\circ} \mathrm{C}$ rise in temperature is nearly

146548 A steel rod of length $5 \mathrm{~m}$ and radius $2 \mathrm{~cm}$ kept at room temperature is heated to $10^{\circ} \mathrm{C}$ above the room temperature. The \% change in the volume is
(Coefficient of linear expansion of steel $=10 \times$ $10^{-6}{ }^{0} \mathrm{C}^{-1}$ )

146549 Assertion (A): A brass disc is just fitted in a hole in a steel plate. The system must be cooled to loosen the disc from the hole.
Reason (R): The coefficient of linear expansion for brass is greater than coefficient of linear expansion for steel.

146545 Rail line is being laid at $0^{\circ} \mathrm{C}$ with metal beams of length $10 \mathrm{~m}$ each and of material having coefficient of linear expansion $11 \times 10^{-6} /{ }^{\circ} \mathrm{C}$. How much gap has to be kept between consecutive beams is maximum temperature at that place is $50{ }^{\circ} \mathrm{C}$ ?

146547 The coefficient of volume expansion of a material is $5 \times 10^{-4}{ }^{\circ} \mathrm{C}^{-1}$. The fractional change in its density for a $40^{\circ} \mathrm{C}$ rise in temperature is nearly

146548 A steel rod of length $5 \mathrm{~m}$ and radius $2 \mathrm{~cm}$ kept at room temperature is heated to $10^{\circ} \mathrm{C}$ above the room temperature. The \% change in the volume is
(Coefficient of linear expansion of steel $=10 \times$ $10^{-6}{ }^{0} \mathrm{C}^{-1}$ )

146549 Assertion (A): A brass disc is just fitted in a hole in a steel plate. The system must be cooled to loosen the disc from the hole.
Reason (R): The coefficient of linear expansion for brass is greater than coefficient of linear expansion for steel.

146545 Rail line is being laid at $0^{\circ} \mathrm{C}$ with metal beams of length $10 \mathrm{~m}$ each and of material having coefficient of linear expansion $11 \times 10^{-6} /{ }^{\circ} \mathrm{C}$. How much gap has to be kept between consecutive beams is maximum temperature at that place is $50{ }^{\circ} \mathrm{C}$ ?

146547 The coefficient of volume expansion of a material is $5 \times 10^{-4}{ }^{\circ} \mathrm{C}^{-1}$. The fractional change in its density for a $40^{\circ} \mathrm{C}$ rise in temperature is nearly

146548 A steel rod of length $5 \mathrm{~m}$ and radius $2 \mathrm{~cm}$ kept at room temperature is heated to $10^{\circ} \mathrm{C}$ above the room temperature. The \% change in the volume is
(Coefficient of linear expansion of steel $=10 \times$ $10^{-6}{ }^{0} \mathrm{C}^{-1}$ )

146549 Assertion (A): A brass disc is just fitted in a hole in a steel plate. The system must be cooled to loosen the disc from the hole.
Reason (R): The coefficient of linear expansion for brass is greater than coefficient of linear expansion for steel.

146545 Rail line is being laid at $0^{\circ} \mathrm{C}$ with metal beams of length $10 \mathrm{~m}$ each and of material having coefficient of linear expansion $11 \times 10^{-6} /{ }^{\circ} \mathrm{C}$. How much gap has to be kept between consecutive beams is maximum temperature at that place is $50{ }^{\circ} \mathrm{C}$ ?

146547 The coefficient of volume expansion of a material is $5 \times 10^{-4}{ }^{\circ} \mathrm{C}^{-1}$. The fractional change in its density for a $40^{\circ} \mathrm{C}$ rise in temperature is nearly

146548 A steel rod of length $5 \mathrm{~m}$ and radius $2 \mathrm{~cm}$ kept at room temperature is heated to $10^{\circ} \mathrm{C}$ above the room temperature. The \% change in the volume is
(Coefficient of linear expansion of steel $=10 \times$ $10^{-6}{ }^{0} \mathrm{C}^{-1}$ )

146549 Assertion (A): A brass disc is just fitted in a hole in a steel plate. The system must be cooled to loosen the disc from the hole.
Reason (R): The coefficient of linear expansion for brass is greater than coefficient of linear expansion for steel.