If you wish to warm 50 kg of water by 20°C for your bath, show that the amount of heat needed is 1000 kcal (1000 Cal). Then show that this is equivalent to about 4200 kJ.

Q: Why will wrapping a bottle in a wet cloth at a picnic often produce a cooler bottle than placing the…

A: When a bottle is kept in a bucket of cold water, the bottle is being cooled by the process called…

Q: Which contains more heat, a coffee cup of boiling water or a bathtub with water at room temperature?

A: An average size bathtub contains 250 kg of water and an average size cup contains 0.25 kg of water.…

Q: On a chilly 10°C day, your friend who loves cold weather says she wishes it were twice as cold.…

A: Here, 10°C in Kelvin = 10+273 = 283 K         -131.5°C in Kelvin = -131.5+273 = 141.5 K

Q: Compare the rate of heat conduction through a 13.0-cm-thick wall that has an area of 10.0 m2 and a…

A:

Q: What is evaporation?

A: Evaporation is a fundamental part of the water cycle and it is constantly occurring throughout the…

Q: Does convection happen when you mix water and food coloring that are at the same temperature?

A:

Q: If the specific heat capacity of water were less, would a nice hot bath be a longer or shorter…

A: The formula of the specific heat:

Q: A 50 KW electric furnace measure 1.2m x 1.0m x 0.8m. When the temperature inside the furnace is 1520…

A:

Q: Why should we wear cotton clothes in summer?

A: We sweat more in the summer session. Cotton is a strong water absorber helps to absorb the sweat and…

Q: Why do woolen blankets keep us warm better than cotton sheets?

A: In the woolen blanket, there are more gaps. So, more air are confined within woolen blanket. Air is…

Q: Show that 5000 cal of heat is needed to increase the temperature of 50 g water from 0 deg C to 100…

A: Given data as per question Mass of water =50 g Temperature range = 0 to 1000 c Specific heat…

Q: What happens to the volume of water as it cooled from 3 degree C - 1 degree C?

A:

Q: What makes heat transfer by radiation different from conduction and convection?

A:

Q: In what forms is thermal insulation available?

A: Thermal insulation is the process of reducing heat from the surroundings. It can be done using many…

Q: Which has greater specific heat capacity- an object that cools quickly, or an object of the same…

A: Specific heat capacity is the amount of heat energy that must be added to unit mass of a substance…

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: Discuss why wearing more layers of clothing during winter keeps us warmer than wearing just one…

A: Given:Discuss why wearing more layers of clothing during winter keeps us warmer than wearing just…

Q: What generally happens to the temperature of rising air and sinking air?

A: If the Air sinking down compresses air at the surface, raising temperatures near the ground. The…

Q: Cooling is produced when a gas at high pressure suddenly expands. Explain.

A: When the gas at high pressure suddenly expands, the average distance between its molecules…

Q: How does perspiration give the body a means of cooling itself?

A: To determine: How the perspiration give the body a means of cooling itslef

Q: Why two thin blankets are warmer than a single blanket of double the thickness?

A: Step 1If there are more layers, air can’t pass deeper.

Q: explain why convection and conduction occur in making squash soup?

A: explain why convection and conduction occur in making squash soup?

Q: Is fur a source of heat to our body?

A: Step 1Animals maintain their body temperature by thermo regulation.

Q: What type of heat transfer helps the balloon rise?

A: To determine the mode of heat transfer that helps the balloon to rise.

Q: Does a body at 0 degree C radiate any heat?

A:

Q: Which will undergo the greater rate of cooling- a red hot poker in warm oven or red hot poker in…

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

Q: What is thermal expansion?

A: when there is a variation in the temperature of the object, there is a chance for the expansion of…

Q: Why is being burned by steam more damaging than being burned by water at the same temperature (100…

A: when the state of any matter changes from one state to another state  its temperature when the state…

Q: How are heat and temperature different?

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Q: What is thermal equilibrium?

A:

Q: If you were caught in freezing weather with only your own body heat as a source, would you be warmer…

A: In a freezing weather, only source of heat available is body temperature.

Q: What is limitation of Newton's cooling law?

A: The limitation s of the newtons cooling law are as follows:1. The difference of temperature between…

Q: When does Thermal equilibrium occur?

A: A thermal equilibrium between two systems occurs when there is no net exchange of heat between them.

Q: Consider a 6.0-g steel nail 8.0 cm long and a hammer that exerts an average force of 600 N on the…

A: Given:  mass,m = 6 g = 0.006 kg  Force,F = 600 N  distance, d = 8 cm = 0.08 m  specific heat,  c =…

Q: Desert sand is very hot in day and very cool at night. What does this indicate about its specific…

A: The formula of the specific heat:

Q: Does heat flow into cold areas or does cold flow into hot areas?

A: Yes heat flows from hot to cold area or we can say it moves with the help of particle or atom. for…