True or false Objects require more energy to melt than evaporate.

Q: Consider a cylinder with a length of 15 cm and a diameter of 10 cm. The cylinder has a surface…

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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: Materials A, B, and C are solids that are at their melting temperatures. Material A requires 200 J…

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Q: A copper rod having a cross-section of 5 cm? and a length of 50 cm has one end in contact with…

A: Area, A = 5 cm2 length, d = 50  cm= 0.5 m  Coefficient of thermal conductivity, K = 385 W/ m K…

Q: What are two effects that adding heat can have on a solid object?

A: The below are the two effects

Q: What is the energy needed to melt 0.52 kg of gold? (Use: Lf of gold = 63 kJ/kg) Select one: a. 0.64…

A: Required The energy needed to melt gold.

Q: A temperature difference of 1 degree Fahrenheit is also equal to a temperature difference of 1 on…

A: Given. Temperature difference=1°F 1°F=59 degree celcius A difference in 1 degree fahrenheit is same…

Q: A bi-metallic strip is a strip with two pieces of 1.aluminum that absorb heat efficietly 2.metal…

A: Bi-metallic strip consists of two metals which expands at different rates when heated, The different…

Q: A brass boiler has a base area of 0.15 m2 and thickness 1.0 cm. It boils water at the rate of 6.0…

A: Given information:The rate of evaporation of water (E) = 6 kg/min = 0.1 kg/sThe latent heat of…

Q: The lower surface of a slab of stone of face-area 3600 cm and thickness 10 cm is exposed to steam at…

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Q: Hot and/or cold objects can be said to “contain” a certain level or amount of “heat.” _________.

A: The energy that flows due to temperature difference is called as heat .(the energy  which is flowing…

Q: What usually happens when vapor condenses into liquid? a. it absorbs heat b. it rejects heat c. its…

A: Solution: Step1 - Here we will understand the concept that will be used to solve the question. As we…

Q: Calculate the total amount of energy (in kJ) required to boil 0.2 kg of Mercury at its boiling point…

A: Mass of mercury =0.2kg latent heat of vaporisation=2.96×105Jkg-1  boiling point of mercury =+357oC

Q: Why do farmers fill their fields with water on a cold winter night?

A: Water flows through the fine capillary veins of the plants. If the temperature on a cold winter…

Q: A 20 kW drilling machine is used to drill a bore in a small aluminium block of mass 8.0 kg. How much…

A: Given that, 50% of power is used up in heating the machine itself or lost to the surroundings. Then…

Q: The objects made up of steel, mica, wood and brass are lying in the same room during winter season.…

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Q: The specific heat of copper is 0.093 cal/gCo, and the specific heat of aluminum is 0.22 cal/gCo. The…

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Q: Material Specific Heat (J/kg °C) water (pure) 4,184 aluminum 900 steel 470 silver 235 oil 1,900…

A: Given :- mass of aluminum piece (M) = 0.8 Kg increase in temperature (T) = 15oC  specific heat of…

Q: What is the reason why Ice with salt melts faster than Ice only?

A: Given : Ice with salt melts faster than Ice only.

Q: Latent heat of a substance depends on the .............. of the substance: O a. mass O b. material…

A: Latent heat is the quantity of heat released or absorbed by a unit mass of a substance resulting in…

Q: A 0.250-kg block of a pure material is heated  rom 20.0ºC to 65.0ºC by the addition of 4.35 kJ of…

A: The energy needed to change the temperature is

Q: A piece of glass is heated to a high temperature and then allowed to cool. If it cracks, a probable…

A: piece of glass is heated to a high temperature and then allowed to cool. If it cracks, a probable…

Q: when solid melts it _____. A. gain heat and its temperature decreases B. gains heat and its…

A: gaining of heat to the substance makes solid melts so option c was wrong  temperature decrease is…

Q: On a certain dry sunny day, a swimming pool's temperature would rise by 1.10°C if not for…

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Q: A slab of stone of area 0.36 m² and thickness 0.1 is exposed on the lower surface to steam at 100°C.…

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Q: what is the purpose of determining the cooling constant?

A: According to the Newton's law of cooling, The cooling rate is proportional to the temperature…

Q: in a hot room than in a cold room. A glass of cold water will Cool faster Cool slower Remains same…

A: To cool a given object ,heat must be removed from the object and to make the object hot ,heat must…

Q: A 0.250-kg block of a pure material is heated from 20.0C to 65.0C by the addition of 4.35 kJ of…

A: mass, m = 0.25 kg  T = 20 degree C  T' =  65 degree C  heat, H = 4.35 kJ

Q: If a piece of lead is hammered, it is found to be warmer.Why?

A: Every time a piece of lead is hammered, the kinetic energy of the hammer gets transferred to the…

Q: If water that boils due to reduced pressure is not hot, then is ice formed by the reduced pressure…

A: From the ideal gas equation:

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: Had this answered before, but I'm still confused... here is the table from the book.

A: A.Heat required to raise temperature of ice cube to melting point is

Q: What evidence can you cite for the claim that water can boil at a temperature of 0°C?

A: The boiling point of water at standard atmospheric pressure is hundred degree Celsius. The boiling…

Q: A brass boiler has a base area of 0-15 m2 and thickness 1.0 cm. It boils water at the rate of 6-0…

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Q: Heat flows as a result of difference of _____.   A) Temperature B) Density C) mass D) Volume

A: In thermodynamics, heat is the transfer of energy from one body for another body or body to…

Q: The cover of a solar coker is made of glass because:    A) it absorbs sun's rays B) it reflects…

A: The glass always produces the green house effect. It does not allow the smaller wavelength to escape…

Q: Which material will make the best calorimeter? Foam cup O Glass cup O Aluminum can Plastic cup

A: Foam cup is a bad conductor of heat.

Q: Heat enters the system when substance undergoes a phase change of   A. condensation   B.…

A: Condensation- In this gaseous form of water or water vapors get converted into liquid form of water.…

Q: A solid ball of metal has a spherical cavity inside it. When the ball is heated the volume of the…

A: To determine: The correct option.

Q: How much heat (in kJ) must be added to completely transform the liquid water at 1.00°C to liquid…

A: Given data:   Mass (m) = 2.00 kg Initial temperature (T0) = 1.00°C Final temperature (T) = 100°C…

Q: On a certain dry sunny day, a swimming pool's temperature would rise by 1.10°C if not for…

A: