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Select the correct graphs showing variation of density of water with increase in temperature
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Important Questions on Thermal Properties of Matter
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Physics>Heat and Thermodynamics>Thermal Properties of Matter>Thermal Expansion of Solids, Liquids and Gases
A uniform cylindrical rod of length and radius r, is made from a material whose Young’s modulus of Elasticity equals When this rod is heated by temperature T and simultaneously subjected to a net longutudinal compressional force F, its length remains unchanged. The coefficient of volume expansion, of the material of the rod, is (nearly) equal to:HARD
Physics>Heat and Thermodynamics>Thermal Properties of Matter>Thermal Expansion of Solids, Liquids and Gases
A pendulum clock loses 12 s a day if the temperature is C and gains 4s a day if the temperature is C. The temperature at which the clock will show correct time, and the co-efficient of linear expansion of the metal of the pendulum shaft are respectively:EASY
Physics>Heat and Thermodynamics>Thermal Properties of Matter>Thermal Expansion of Solids, Liquids and Gases
A copper rod of and an aluminum rod of unknown length have their increase in length independent of increase in temperature. The length of aluminum rod is MEDIUM
Physics>Heat and Thermodynamics>Thermal Properties of Matter>Thermal Expansion of Solids, Liquids and Gases
When the temperature of a metal wire is increased from , its length increases by .The percentage change in its mass density will be closed to:
MEDIUM
Physics>Heat and Thermodynamics>Thermal Properties of Matter>Thermal Expansion of Solids, Liquids and Gases
A rod, of length at room temperature and uniform area of cross section is made of a metal having coefficient of linear expansion It is observed that an external compressive force is applied on each of its ends, prevents any change in the length of the rod when its temperature rises by Young's modulus, for this metal is:HARD
Physics>Heat and Thermodynamics>Thermal Properties of Matter>Thermal Expansion of Solids, Liquids and Gases
A leak proof cylinder of length made of a metal which has very low coefficient of expansion is floating vertically in water at such that its height above the water surface is When the temperature of water is increased to the height of the cylinder above the water surface becomes The density of water at relative to the density at is close to:MEDIUM
Physics>Heat and Thermodynamics>Thermal Properties of Matter>Thermal Expansion of Solids, Liquids and Gases
A simple pendulum made of a bob of mass m and a metallic wire of a negligible mass has a time period of at . If the temperature of the wire is increased, and the corresponding change in its time period is plotted against its temperature, the resulting graph is a line of slope . If the coefficient of linear expansion of metal is , then the value of isEASY
Physics>Heat and Thermodynamics>Thermal Properties of Matter>Thermal Expansion of Solids, Liquids and Gases
A steel rod at is observed to be long when measured by another metal scale which is correct at . The exact length of steel rod at is EASY
Physics>Heat and Thermodynamics>Thermal Properties of Matter>Thermal Expansion of Solids, Liquids and Gases
The value of coefficient of volume expansion of glycerin is . The magnitude of fractional change in the density of glycerin for a rise of in its temperature is:MEDIUM
Physics>Heat and Thermodynamics>Thermal Properties of Matter>Thermal Expansion of Solids, Liquids and Gases
The pressure that has to be applied to the ends of a steel wire of length to keep its length constant when its temperature is raised by is :(For steel, Young's modulus is and coefficient of thermal expansion is )
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Physics>Heat and Thermodynamics>Thermal Properties of Matter>Thermal Expansion of Solids, Liquids and Gases
Two different wires having lengths and and respective temperature coefficient of linear expansion and are joined end-to-end. Then the effective temperature coefficient of linear expansion is :EASY
Physics>Heat and Thermodynamics>Thermal Properties of Matter>Thermal Expansion of Solids, Liquids and Gases
Coefficient of linear expansion of brass and steel rods are and . Lengths of brass and steel rods are and , respectively. If is maintained the same at all temperatures, which one of the following relations holds good?EASY
Physics>Heat and Thermodynamics>Thermal Properties of Matter>Thermal Expansion of Solids, Liquids and Gases
Two rods of different materials having coefficients of linear expansion and Young's modulii and respectively are fixed between two rigid massive walls. The rods are heated such that they undergo the same increase in temperature. There is no bending of rods. If , the thermal stresses developed in the two rods are equally provided is equal toHARD
Physics>Heat and Thermodynamics>Thermal Properties of Matter>Thermal Expansion of Solids, Liquids and Gases
At a brass wire of radius is hung from the ceiling. A small mass, is hung from the free end of the wire. When the wire is cooled down from to it regains its original length of The value of is close to:(Coefficient of linear expansion and Young’s modulus of brass are and respectively; )
MEDIUM
Physics>Heat and Thermodynamics>Thermal Properties of Matter>Thermal Expansion of Solids, Liquids and Gases
The coefficient of linear expansion of crystal in one direction is and that in every direction perpendicular to it is . The coefficient of cubical expansion isEASY
Physics>Heat and Thermodynamics>Thermal Properties of Matter>Thermal Expansion of Solids, Liquids and Gases
The area measured on the surface of a solid body of coefficient of linear expansion is at some initial temperature. If the temperature changes by , the approximate change in area, isHARD
Physics>Heat and Thermodynamics>Thermal Properties of Matter>Thermal Expansion of Solids, Liquids and Gases
A piece of metal weighs in air. When it is immersed in a liquid of specific gravity at it weighs . When the temperature of the liquid is raised to the metal piece weighs . Specific gravity of the liquid at is The coefficient of linear expansion of the metal isMEDIUM
Physics>Heat and Thermodynamics>Thermal Properties of Matter>Thermal Expansion of Solids, Liquids and Gases
A compressive force, is applied at the two ends of a long thin steel rod. It is heated, simultaneously, such that its temperature increases by . The net change in its length is zero. Let be the length of the rod, A its area of cross-section, its Young's modulus, and its coefficient of linear expansion. Then, is equal to:HARD
Physics>Heat and Thermodynamics>Thermal Properties of Matter>Thermal Expansion of Solids, Liquids and Gases
The ends Q and R of two thin wires, PQ and RS, are soldered (joined) together. Initially each of the wires has a length of at Now the end P is maintained at while the end S is heated and maintained at The system is thermally insulated from its surroundings. If the thermal conductivity of wire PQ is twice that of the wire RS and the coefficient of linear thermal expansion of PQ is the change in length of the wire PQ isMEDIUM
Physics>Heat and Thermodynamics>Thermal Properties of Matter>Thermal Expansion of Solids, Liquids and Gases
A pendulum is hung from the roof of a sufficiently high building and is moving freely to and fro like a simple harmonic oscillator. The acceleration of the bob of the pendulum is at a distance of from mean position. The time period of oscillation is