There is more than a single reason why pouring a cup of hot coffee into a saucer results in faster cooling. Discuss two reasons.

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

A:

Q: When a solid body is heated, what happens to its mass and density?

A: Density = Mass/Volume   When a substance is heated its volume increases and so the density…

Q: Which two factors affect the amount of thermal energy an object has?

A: Thermal energy is total energy caused by motion

Q: Woollen clothes are poor conductor of heat but they keeps us warm. Give reason

A: Woolen clothes are thin and there is no much air gap between the fabric. The air pockets lying in…

Q: Why is a calorimeter box made up of Copper?

A: A calorimeter box is made up of Copper because i) Cu has low SHC & thus it reaches the…

Q: Which has more heat: 1g of ice at 0 degree C or 1g of water at 0 degree C? Give reason.

A: Latent heat is the measure of the heat energy per mass released or absorbed during a phase change.

Q: Why is thermal pollution a relative term?

A: Thermal pollution is the thermal energy pumped into the atmosphere, water bodies, etc. by the…

Q: When you open the door to an air conditioned room in the summer are you letting cold air out or hot…

A: When the door to an air conditioned room in the summer is opened.   And we need to tell whether we…

Q: On a cold winter morning, why does the metal of a bike feel colder than the wood of a porch?

A: The thermal conductivity of the metal of a bike is higher when compared to that of the thermal…

Q: How does specific heat of metal compare to that of water?

A: The expression to determine the specific heat will be,

Q: How does the kind of material of the calorimeter affect the cooling of the liquid samples?

A: The change in temperature of the liquid is dependent on the material of the calorimeter. A liquid…

Q: When can you add heat to something without raising its temperature?

A: When water is heated, the temperature rises till 100oC and then it boils. After this point, the…

Q: Which is the smaller temperature increment - a degree Celsius or a degree Fahrenheit? Explain.

A: You see that Celsius has 100 degrees between the freezing and boiling point, whereas Fahrenheit has…

Q: When air is quickly compressed, why does its temperature increase?

A: Explanation:

Q: Explain why a cup of water (or soda) with ice cubes stays at 0oC, even on a hot summer day.

A: Thermal equilibrium: If the temperature of the system remains constant, the system is said to be in…

Q: Explain why a cup of water (or soda) with ice cubes stays at 0ºC , even on a hot summer day.

A: The ice and the liquid water (or soda) will be in thermal equilibrium. Therefore, the temperature of…

Q: Which will normally warm faster - a black pot of cold water or a silvered pot of cold water?…

A: The black pot of cold water will normally warm faster than the silvered pot of cold water.

Q: Is it the boiling of water or the higher temperature of water that cooks food faster in a pressure…

A: Food can be cooked more quickly in a pressure cooker.

Q: Does a substance that heats up quickly have a high or a low specific heat capacity?

A: The amount of heat required to raise the temperature of unit mass of substances through one degree…

Q: Two different objects receive the same amount of heat. Give at leasttwo reasons why their…

A: To determine: The reasons why the temperature changes will not be same for the two different objects…

Q: If a cool cup of water is floated inside of a pot of water that is already boiling, will the water…

A: If  cup is conductor of heat the water can boil when its temperature reaches to 100 degree celsius.…

Q: If air is a bad conductor of heat, why do we not feel warm without clothes?

A: Air is a bad conductor of heat because molecules are not close together as in solids. Thus, heat…

Q: When will water boil at a temperature of less than 100°C?

A: Yes, the water can boils at a temperature less than 100 degree Celsius.

Q: Why will wrapping a bottle in a wet cloth for an outing often produce a cooler bottle than placing…

A: Wrapping a bottle in a wet cloth for an outing often produces a cooler bottle than placing the…

Q: An electric fan not only doesn’t decrease the temperature of air, but it actually increases air…

A: Given:  an electric fan

Q: explain the terms convection and conduction?

A: both conduction and convection are mode of heat transfer.conduction is the process in which transfer…

Q: When you step out of a swimming pool on a hot , dry day in the southwest , you feel quite chilly.…

A: When heat flows from our body, we feel chilly.

Q: When heat flows from a warm object in contact with a cool object., do both objects undergo the same…

A: No

Q: Which warms up faster when heat is applied- iron or silver?

A:

Q: what happens as the temperature of an object increases?

A: It is very general scenario with various effects on the body and exhibited by the body. In layman…

Q: What happens to the temperature of water as it is boiling?

A: BOILING: Boiling is the process by which a liquid turns into a vapor when it is heated to its…

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: Why does a piece of watermelon stay cool for a longer time than sandwiches do when both are removed…

A: Given:  watermelon and sandwiches

Q: Make a contrast between a boot that is chilly and a boot that is warm.

A: We have to find the difference between a chill boot and a warm boot.

Q: you are trying to keep your house warm in the winter. using the idea of conduction, convection, and…

A: Conduction is the transfer of energy from more energetic particles of a substance to adjacent less…

Q: How are you quickly able to bring a pan of water to a boil when water is poor conductor of heat?

A: The conductivity of water is less than that of most metals but greater than that of air. Even though…

Q: Does a common electric fan cool the air in the room? If not then why it is used an overly warm room?

A: A fan doesn’t cool the room but it only recirculates the air in the room and the air inside is…

Q: When will water boil at the temperature of less than 100 degree C?

A: The process boiling occurs when the pressure of the atmosphere is equal to the pressure of liquid.…

Q: If you have steel and wood at 0 °C, which feels colder? If you have steel and wood at 100 °C, which…

A: Material having high thermal conductivity transfers heat more easily. Case 1. Metals usually have…