An old remedy for a pair of nested drinking glasses that stick together is to run water at different temperatures into the inner glass and over the surface of the outer glass. Which water should be hot, and which cold?

Q: If you want to preserve the hotness of the coffee, while waiting for your date, should you add the…

A: If you want to preserve the hotness of the coffee, you should add the cream now or later by the…

Q: If you vigorously shake a can of chicken broth back and forth for more than a minute, will the…

A: Yes increases.

Q: Outdoors in winter, Why does a piece of metal feel colder than piece of wood?

A: Due to the thermal conductivity of the metal, the metal feels colder than the wood.

Q: How can you cause heat to flow from a body at lower temperature to one at higher temperature?

A: Heat can flow from a body at high temperature to a body at low temperature by any one or combination…

Q: When is a system considered to be in thermal equilibrium? When does heat transfer from one body to…

A: Required : When is a system considered to be in thermal equilibrium.

Q: Explain why on a cold day the metal door handle of an automobile feels colder to touch than a…

A: The thermal conductivity of a metal is greater than that of plastic. The difference is in the order…

Q: What can go wrong if you grasp the handle of a hot skillet with a wet thin dishcloth?

A: When we hold the handle of a hot skillet with a wet thin dishcloth, then the water molecules…

Q: Why is wet sand at a beach cooler to walk on than dry sand?

A: Walk on the wet sand

Q: Is it valid to say that a hot object contains more heat than a coldobject?

A: Answer is NO. Heat is not a quantity it is the energy in transit between two bodies of different…

Q: When a 1-kg metal pan containing 1 kg of cold water is removed from the refrigerator and set on a…

A: Basic Details         The amount of heat absorbed depends on the mass of the element, the specific…

Q: If you hold one end of a metal bar against a piece of ice, the end in your hand will soon become…

A: Conduction : The process in which heat flows from objects with higher temperature to objects with…

Q: Why does water in a metal canteen stay cooler if the clothjacket surrounding the canteen is kept…

A: Metal can is cooler

Q: What is wrong with the following statement: “Given any two bodies, the one with the higher…

A: Heat is amount of energy that flows from a higher temperature body to the low temperature body. It…

Q: On a very cold sunny day, you wear a black coat and a transparent plastic coat. Which coat should be…

A:

Q: ‘An object contains more heat’- is it a right statement? If not why?

A: Heat: Heat is energy transferred to or from a thermodynamic system by methods other than…

Q: Would you expect the temperature of water at the bottom of Niagara Falls to be slightly higher than…

A: The potential energy at the top is converted into heat at the bottom. This energy is used to rise…

Q: What is the distinction between gas and vapor?

A: Gas is a single defined thermodynamic phase or state. It has  its own unique physical and chemical…

Q: Air-conditioning units contain no water whatever, yet it is common to see water dripping from them…

A: Given:  air conditioning unit

Q: A tile floor may feel uncomfortably cold to your bare feet, but a carpeted floor in an adjoining…

A: Required :: Why does a tile floor may feel uncomfortably cold to your bare feet, but a carpeted…

Q: 9 Which one of the following objects, all initially at the same temperature, will be least efficient…

A: In question, we are asked to find out the option which is least efficient in losing(radiating heat).…

Q: When can you withdraw heat from object without lowering its temperature?

A: Change of phase occurs when the system undergoes transition between phases like solid, liquid, and…

Q: Knowing the direction of heat flow, explain why if you leave a hot bowl of soup out in the open on…

A: In thermodynamics we have system and surroundings.  System is the area we are focus to study.…

Q: Is there more than one method of heat transfer? If so, then how are they similar and different than…

A: Heat is the transfer of energy from one medium to another. The heat can be transferred by:…

Q: An astronaut has two objects that are identical in all respects, except that one is painted black…

A: Which of the two objects painted black and silver cools down at a faster rate.

Q: Air is a bad conductor of heat , but still we donot feel warm without clothes, Why?

A:

Q: Explain why a marble floor appears colder than cemented floor in winter though both are at same…

A: We feel an object cold because it takes away heat from our body when we come into contact with that…

Q: On a cold day, Why does a metal door knob feel colder than wooden door?

A: Metal is a very good conductor of heat energy than wood. So, it conducts heat away from our hand…

Q: Consider a flat steel plate with a hole through its center. When the temperature of the plate is…

A: When the temperature is decreased, the hole will contract as the plate contract around it. Because…

Q: Consider a flat steel plate with a hole through its center as shown in the figure. When the…

A:

Q: Metal lids on glass jars can often be loosened by running hot water over them. Why does that work?

A: Metal lid on glass jar is generally made up of steel or aluminum.

Q: The heat never flows spontaneously from a colder object to a hotter object. why?

A: Heat flows

Q: What has the greatest increase in Temperature given these materials of the same mass receive the…

A:

Q: If two objects are in thermal equilibrium, that means they have the same

A: Thermal equilibrium is the state in which heat transfer between the two object is zero. The heat…

Q: Can two objects be in thermal equilibrium if they are not touching ?

A: Zeroth law of thermodynamics If two objects A and B are in thermal equilibrium with another object…

Q: If placed in outer space where there is a near vacuum, a heated object will lose almost all of its…

A:

Q: Can all three modes of heat transfer occur simultaneously (in parallel) in a medium?

A: Due to difference in temperature energy get transfer, this energy is heat energy. Transfer of heat…

Q: Consider two walls of a house that are identical except that one is made of 10-cm-thick wood, while…

A:

Q: Inside a room at a uniform comfortable temperature, metallic objects generally feel cooler to the…

A:

Q: A piece of wood lying in the Sun absorbs more heat than a piece of shiny metal. Yet the metal feels…

A: A piece of wood lying in the Sun absorbs more heat than a piece of shiny metal.

Q: Can there be any heat transfer between two bodies that are at the same temperature but at different…

A: Heat transfer is a branch of thermal physics that concern with the transfer of heat from one body to…

Q: On a hot summer day, a student turns his fan on when he leaves his room in the morning. When he…

A: Given:  Hot summer day