AP EAPCET (Engineering) Thermal Properties of Matter — practice questions
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Practice AP EAPCET (Engineering) Thermal Properties of Matter in the app →Temperature of a body is best described as which of these?Heat flows between a system and its surroundings because of a difference in what?What is the SI unit of heat energy transferred?Which property is commonly used in liquid-in-glass thermometers?How many fixed reference points are needed to define a standard temperature scale?On the Fahrenheit scale, which values do the ice point and steam point have?How many equal intervals lie between the two fixed points on the Fahrenheit scale?A bath water reads 50 °C. What is this temperature on the Fahrenheit scale?At what temperature do the Celsius and Fahrenheit scales show the same number?A room is at 77 °F. What is its temperature in degrees Celsius?For a fixed mass of gas at constant temperature, which quantity stays constant?Which equation is the ideal-gas equation for µ moles of gas?What is the value of the universal gas constant R?In a constant-volume gas thermometer, temperature is read in terms of which quantity?What value of absolute zero is obtained by extrapolating gas pressure to zero?The absolute temperature scale is named after which scientist?Which relation connects the Kelvin temperature T and Celsius temperature tC?A furnace is at 27 °C. About what temperature is that in kelvin?How does one kelvin compare in size with one degree Celsius?At which temperature is the triple point of water located?Why is the triple point of water preferred as a fixed point?The increase in dimensions of a body due to a rise in its temperature is called what?What is the expansion in length of a solid on heating called?How is the coefficient of volume expansion related to the linear coefficient?A thin metal plate is heated by ΔT. Its fractional area increase equals what?Which of these metals has the greatest coefficient of linear expansion?Which of these materials expands least on heating?What does water do on heating from 0 °C to 4 °C?At what temperature does liquid water reach its maximum density?What is the stress set up in a rod that is prevented from expanding on heating?Why does a tight metal lid on a bottle loosen in hot water?Heat needed to warm a substance depends on its mass, the temperature change and what else?Heat capacity S of a substance is defined as which ratio?Which quantity is heat per unit mass per unit rise in temperature?Which symbol denotes molar specific heat capacity at constant pressure?Why does land warm faster than the sea during the day?In the daytime, a sea breeze blows in which direction near a coast?At night near a coast, what happens to the daytime convection cycle?What does the word calorimetry mean?With no heat lost outside, heat lost by the hotter part equals what?200 g of water at 80 °C is mixed with 300 g of water at 20 °C. What is the final temperature?How much heat raises the temperature of 2 kg of water by 10 K? (swater = 4186 J kg–1 K–1)What is the change of state from solid to liquid called?What is the refreezing of water after the pressure on it is removed called?Why is skating possible on snow?What condition defines the triple point of a substance?What is latent heat?Latent heat of fusion refers to which change of state?How much heat melts 2 kg of ice at 0 °C if Lf is 3.33 × 10^5 J/kg?Extra heat is added to water already boiling at 1 atm. What does it cause?Which of these is NOT one of the three modes of heat transfer?How does heat pass through a solid in conduction?Which state of matter is generally a poor thermal conductor?What is the SI unit of thermal conductivity K?A bar's length is doubled, with the same end temperatures and area. What happens to heat current?Two identical rods are placed side by side to act as one wider rod, ends at same temperatures. Heat current beA rod has K = 400 W m–1 K–1, A = 1.0 × 10^-4 m², L = 0.5 m and ends 100 K apart. What is the heat current?A material has a larger thermal conductivity. How does it conduct heat?Natural convection is responsible for which of these?Which of these is an example of forced convection?Which steady surface wind blows from the north-east towards the equator?Which mode of heat transfer needs no material medium?Why do people prefer light-coloured clothes in summer?Why are the bottoms of cooking utensils blackened?What is the purpose of the silvered walls of a Dewar flask?What kind of spectrum does thermal radiation at any temperature have?A star's peak emission is at 2.9 µm. With Wien's constant 2.9 × 10–3 m K, what is its surface temperature?The absolute temperature of a blackbody doubles. By what factor does radiated power change?What is the emissivity e of a perfect radiator?As iron is heated in a flame, what colour sequence does it show?Newton's law of cooling holds good only when the temperature difference is what?Blackbody radiation curves depend on which property of the body?Heat capacity of a system undergoing a phase change isHeat capacity of an object is an extensive property. Which related quantity is intensive?How many joules are in one kilocalorie (food calorie), as defined exactly?The unit J/K is equivalent to which combination of base units?A temperature rise of 1 degree Celsius equals a rise of how many kelvin?