What is regelation? a) Refreezing of ice on addition of impurities b) Refreezing of ice on reduction in pressure c) Melting of ice at lower temperature than its melting point due to increase in pressure d) Melting of ice at higher temperature than its melting point

Q: 15. A O.100 kg copper sample is dropped from the roof of a 50.0 meter high building. If 50 % of…

A: The heat absorbed by the copper sample is given as, Here, m, cCu and ΔT represent the mass of…

Q: Why is melting of ice considered as a reversible process? A. It is natural for ice to melt by…

A: In thermodynamic reversible process are those process which can come to the initial point after…

Q: 5. Give examples of solids that expand or contract due to temperature changes?

A: Most substances expand on heating and contact on cooling as a change on the temperature of the body…

Q: For thermal expansion of a solid due to a small change in temperature, the solid’s coefficient of…

A: Any substance, whether it is solid or liquid expands on heating this is called thermal expansion.…

Q: which of the followig always accompanies the formation of water from ice ? A. an absorpation of…

A: The amount of thermal energy required for the formation of water from ice is called as latent heat…

Q: A substance undergoes a phase change of melting. During melting ,Tempertaure  ......choose one…

A: During melting process, energy of the substance goes exclusively to change the phase of a substance,…

Q: What is the change in temperature of 2.2 kg of the following substances if 8.5 x 10^3 J of thermal…

A: The thermal energy is added to each of the substances: Q=mcΔT⇒ΔT=Qmc Where Q is heat transfer, m is…

Q: What must (necessarily) happen when heat is added to a material? A. The temperature of the material…

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Q: 20 grams of ice at 0 degree celcius was mixed with 20 grams of water at 10 degree celcius. What is…

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Q: What is the change in temperature of 2.2 kg of the following substances if 8.5 x 10^3 J of thermal…

A: Hi, you have submitted multiple subpart questions and it is not specified which parts you need help…

Q: If the temperature of an object goes down, then heat must have been removed from it. Hint: think…

A: Heat is the total energy of molecular motion in a substance while temperature is a measure of…

Q: What is the change in temperature of 2.2 kg of the following substances if 8.5 x 10^3 J of thermal…

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Q: 1. Explain the phase change of the cubes of ice turned into water vapor.

A: At first fusion occurs ie with increase of temperature the ice reaches to temperature 0°C and start…

Q: 3.87kg lead billet is to be melted for a casting operation. Lead has a melting point of 328°C a…

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Q: What is the unit of coefficient of area expansion? a) per °C b) °C c) per (°C)2 d) (°C)2

A: To find: The unit of coefficient of area expansion

Q: Which best describes the relationship between two systems in thermal equilibrium? a. no net energy…

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Q: What is the unit of calorific value?   A) kN/kg B) kJ/kg C) kW/sec D) kCal/sec

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Q: Which of the following correctly describes the rate of conductive heat transfer for a substance? a.…

A: Answer: The expression to determine the conductive heat transfer is given by, Qt=kAT2-T1d Here, Q is…

Q: To freeze water into ice you must: Select one: a. Put calories of heat energy into the water b. Take…

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Q: If you want to melt an ice cube. Do you need to add or remove energy to it?

A: Introduction :- An ice cube is given and we want to melt it. So we need to tell the for its melting,…

Q: The average  kinetic energy of ice particles ______ as ice melts. A. Decrease B. Increase  C.…

A: There  is  nо  сhаnge  in  the  temрerаture  оf  the  iсe  when  it  melts  tо  wаter  beсаuse  the…

Q: An increase in temperature of the water may cause other changes. An increase in surface water…

A: Rate of evaporation

Q: A water temperature rise of 18 F in the water cooled condenser is equivalent in C to: O A. -9.44 C…

A: Given data:  The raise in temperature (ΔT) = 18 F Required: The raise in temperature on Celsius…

Q: An ice cube with a smaller uniformly dense iron cube frozen inside floats in a container of water…

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Q: A constant-pressure calorimeter is an example of a __________system   A. Open B. closed C. insulated…

A: A constant pressure calorimeter is used for measuring the change in enthalpy that occurs in a…

Q: What must (necessarily) happen when heat is added to a material? A. The temperature of the material…

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Q: A 0.3 kg ingot of a certain material is heated to 423 ℃ and then fed to a calorimeter containing 0.4…

A: Given mass of ingot = 0.3 kg mass of water = 0.4 kg initial temperature of ingot = 423 ℃ initial…

Q: 12. Material A has half the value of its coefficient of linear expansion compared to Material B.…

A: Given: The coefficient of linear expansion of A is half the coefficient of linear expansion of B.…

Q: A3) Which one of the following describes a process in which the volume of a gas is changed but no…

A: Isochoric Process- Isochoric process is a process where the volume of the system is constant. But…

Q: How much water at 20 degrees Celsius is needed to melt 500 grams of ice at 0 degree Celsius? a.…

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Q: Condensation temperature is the same as evaporation temperature. True or False? a) True b) False

A: True/False: Condensation temperature is the same as evaporation temperature

Q: It is the term used to describe the process of changing solid to gas without passing liquid state.…

A: This process is known as sublimation