Welcome to your Thermal Properties and Processes - Expansivity, Heat Transfer(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. When the state is being changes from gas to liquid through the process of condensation, the temperatureremains constantmay increase or decreaseincreasesdecreases2. On a hilly region, water boils at 95°C. What is the temperature expressed in Fahrenheit?150°F203°F100°F20.3°F3. In an isochoric process, the internal energy of a system decreases by 50 J. What is the heat exchange?50 JZero-50 JNone of the above4. A piece of blue glass heated to a high temperature and a piece of red glass at room temperature, are taken inside a room that is dimly lit, then ___________Blue shines like brighter red compared to the red piecesThe blue piece will look blue and red will look as usualBoth the pieces will look equally redRed looks brighter and blue looks ordinary blue5. The response of a material due to the function of heat is known as __________Chemical propertyMechanical propertyThermal propertyElectrical property6. 540g of ice at 0°C is mixed with 540g of water at 80°C. What is the final temperature of the mixture?0°CLess than 0°40°C80°C7. A faulty thermometer has its fixed points marked as 5° and 95°. The temperature of a body as measured by the faulty thermometer is 59°. Find the correct temperature of the body on a Celsius scale.40°C20°C60°C0°C8. When potassium is added to water, it is seen that the lower region becomes warm first and becomes less dense. It then moves up and the more dense cold water comes down and the process goes on. What is the process taking place?RadiationPurificationConvectionConduction9. An ideal black body is thrown into a furnace. The black body is room temperature. It is observed that _______At all times it is the darkest bodyIt cannot be distinguished at all timesInitially, it is darkest body and at later times the brightestInitially, it is the darkest body and at later it cannot be distinguished10. Compared to burn due to air at 100°C, a burn due to steam at 100°C is _______More dangerousLess dangerousEqually dangerousNot dangerous11. When one end of the rod is heated, the molecules at the hot end vibrate with higher amplitude and transmit the heat from one particle to the adjacent particle and so on. What is the process?RadiationConvectionTransmittanceConduction12. The temperature at which plastics begin to become softer and defer under a load is known as _________Softening pointHeat distortion pointMelting pointEutectic point13. A pure substance would freeze or solidify at itssublimation pointboiling pointcondensation pointmelting point14. Two thermometers are constructed in the same way except that one has a spherical bulb and the other an elongated cylindrical bulb. Which of the two will respond quickly to temperature changes?Elongated cylindrical bulbSpherical bulbAll of the mentionedNone of the mentioned15. Calorie is defined as the amount of heat required to raise the temperature of 1g of water by 1°C and it is defined under which of the following conditions?From 13.5°C to 14.5°C at 76mm of HgFrom 14.5°C to 15.5°C at 760mm of HgFrom 98.5°C to 99.5°C at 760mm of HgFrom 3.5°C to 4.5°C at 76mm of Hg16. Temperatures of two stars are in ratio 3:2. If wavelength of maximum intensity of first body is 4000 Å, what is corresponding wavelength of second body?6000 Å2000 Å9000 Å8000 Å17. Specific heat of materials is expressed in terms of __________W/m Km³/kgJ/KJ/kg K18. The melting point of Iron (Fe) is _________1538°C419°C1084°C660°C19. Solids with weekly bonded electrons are good conductors of heat.FalseTrue20. The thermometer bulb should have ______Varying heat capacityHigh heat capacitySmall heat capacityNo heat capacity21. A block of copper weighs 3.0 kg. Copper has a specific heat capacity of 390 J kg-1K-1. It is cooled in the freezer so that the temperature drops from 25.0oC to 0.0oC. What is the total energy lost by the block of copper?23400 J29250 J32950 J22950 J22. Which of the following is an effective coolant?MecuryOilAcidsWater23. What happens when a material is heated?It contractsIt burstsIt meltsIt expands24. When the first law of thermodynamics, Q = ΔU + W, is applied to an ideal gas that is taken through an isothermal process,ΔU = 0Q = 0W = 0None of the above25. A composite rod made of copper (1.8×10(-5) K(-1)) and steel (α=1.2×10(-5) K(-1)) is heated. Then _____It bends with copper on concave sideData is insufficientIt does not expandIt bends with steel on concave side26 out of 25Time is Up!